HubPages. “The Many Theories Behind Human Bipedalism.” HubPages, 6 June 2011, https://discover.hubpages.com/education/The-Many-Theories-Behind-Human-Bipedalism. Accessed 28 September 2022.

Arizona State University

- HubPages: The Many Theories Behind Human Bipedalism
- Central Washington University 

References for Biological/Physical Anthropology 

HubPages

https://www.discoveranthropology.org.uk/about-anthropology/what-is-anthropology/biological-anthropology.html

Bioanthropology Reference 

Central Washington University. (2022.). Central Washington University. Central Washington University: CWU Home. Retrieved September 9, 2022, from https://www.cwu.edu/

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