References:

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Pappas, C. (2013, December 9). Instructional Design Models and Theories: Classical Conditioning. Retrieved from https://elearningindustry.com/classical-conditioning.

Education Theory Constructivism and Social Constructivism. (n.d.). Retrieved from http://www.ucdoer.ie/index.php?title=Education_Theory/Constructivism_and_Social_Constructivism

David L, "Social Development Theory (Vygotsky)," in Learning Theories, July 23, 2014, https://www.learning-theories.com/vygotskys-social-learning-theory.html.

http://teachinglearningresources.pbworks.com/w/page/31012664/Cognitivism

Pappas, C. (2013, May 9). The Adult Learning Theory - Andragogy - of Malcolm Knowles. Retrieved August 04, 2017, from https://elearningindustry.com/the-adult-learning-theory-andragogy-of-malcolm-knowles)