Here is a set of links for you if you would like to read more about the history of economic thought or economic theories (and their APA citations).
(website also available in Spanish, German, and French)
Network for Pluralist Economics (Netzwerk Plurale Ökonomik e.V. (NPE)). (n.d.) Exploring Economics. https://www.exploring-economics.org/en/
History of Economic Thought Website
Fonseca, Gonçalo. (n.d.) History of Economic Thought. http://www.hetwebsite.net/het/
