Books:
Calori, C. & Eynden, D. (2015). Signage and Wayfinding Design. Hoboken, New Jersey: John Wiley & Sons, Inc. p. 136.
Colling, R. (2001). Hospital and healthcare security. Woburn: Butterworth Heinemann.
Minaha, G. & Nemcsicsb, A (2016). Environmental Color Design. Encyclopedia of Color. Science and Technology p. 637
Rolf, G. (2013). Color an Introduction to Practice and Principles. John Wiley & Sons. Hoboken, New Jersey.
Poore, J. (1994). Interior Colour by design, Rockport Publishers, Inc. USA, Massachchusetts. P. 61.
Engelbrecht, K. (2003). The Impact of Color on Learning. Perkins & Will, Chicago.
Visit Greenland (2020) Retrieved from: https://visitgreenland.com/about-greenland/architecture/
Life style news online. The buildings in Greenland are colour-coded according to their purpose. (2019). Retrieved from: https://lifestylenewsonline.com/travel/the-buildings-in-greenland-are-colour-coded-according-to-their-purpose/
Modern Ideas For Kindergarten Interior. (2015). Retrieved from: https://decor10blog.com/design-decorate/decorating-ideas/modern-ideas-for-kindergarten-interior.html
Fonts in use. Offenbach Hospital Signage System. (2010) Retrieved from: https://fontsinuse.com/uses/1155/offenbach-hospital-signage-system
The site plan of Mall of Arabia Cairo. (2011). Retrieved from: https://www.flickr.com/photos/mallofarabiacairo/5315945128
Discover Granite & Marble. (2020). Retrieved from: https://discovergranite.com/2020/04/10/well-structured-kitchen/
Amazon.co.uk. (2020). Retrieved from: https://www.amazon.co.uk/Chopping-210x148mm-Kitchen-Self-adhesive-Sticker/dp/B0039V5VNS
Amazon. (2020). Retrieved from: https://www.amazon.com/Seville-Classics-Pearlescent-Multi-Color-Multicolor/dp/B00OM52MX2 .
Anarchitectures + A. (2017). Retrieved from: https://anarchitectures.net/post/161090599605/colour-week-architecture-6-multicolour
design milk. (2020). Retrieved from: https://design-milk.com/inside-google-top-secret-data-centers/google-datacenter-1/
ESTY. (2020). Retrieved from: https://www.etsy.com/listing/292260227/door-decal-sign-for-childrens-restrooms
OMGSHOCKINGFACTS. (2019). Retrieved from: http://omgshockingfacts.me/nursery-school-design-ideas/
Adventures of Lion and Princess (2015). Retrieved from: http://www.leoneprincipessa.com/2015/11/19/simple-and-easy-part-1/
Architectures Ideas. (2019). Retrieved from: https://architecturesideas.com/2017/08/28/27-most-cutest-kindergarten-play-school-architecture-designs/
Industrial Flooring. (2013). Retrieved from: http://industrial-flooring.weebly.com/
Vikan. (2020). Retrieved from: https://www.vikan.com/us/knowledge-center/site-survey/
Conference paper in published proceedings online:
Hettiarachchi, A. and Nayanathara, A. (2017). Impact of Class Room Colour on Primary Education. (FARU) Conference University of Moratuwa, Sri Lanka. Volume 1, P123-P134. Retrieved from: https://www.researchgate.net/publication/321727579_Impact_of_class_room_colour_on_primary_education_a_study_implemented_in_a_boy's_primary_school_Colombo
Journal or serial paper from the Internet:
Jansen, P. & Wiedenbauer, G. (2004). Wayfinding Performance in and the Spatial Knowledge of a Color-coded Building for Adults and Children. Spatial Cognition and Computation. 4(4) p338. Retrieved from: https://www.researchgate.net/publication/241608309_Wayfinding_Performance_in_and_the_Spatial_Knowledge_of_a_Color-coded_Building_for_Adults_and_Children
Saif, M. (2011). Colourful Language: Measuring Word – Colour Associations. 2nd Workshop on Cognitive Modeling and Computational linguistics. Oregon USA, P97. Retrieved from: https://www.aclweb.org/anthology/volumes/W11-06/
Viethen, J & Vessem, T & Goudbeek, M & Krahmer, E (2017). The Role of Color Similarity and Color Codability. Cognitive Science.