1. Australian Institute of Health and Welfare. (2020). https://www.aihw.gov.au/search?%7B%22SearchText%22:%22social%20activity%22%7D.
2. Contact zones: Participation, materiality, and the messiness of interaction;Askins;Environment and planning D: Society and Space,2011
3. Outdoor Environments as Children’s Play Spaces: Playground Affordances;Aziz,2015
4. Ecological psychology: concepts and methods for studying the environment of human behavior;Barker,1968
5. Barker, R. G. (1989). Roger G. Barker.