"Francis Hutcheson on the Emotions". Stanford Encyclopedia of Philosophy. 17th and 18th Century Theories of Emotions. Retrieved 19 November 2017.
LeBuffe, Michael (19 November 2017). "Spinoza's Psychological Theory". In Zalta, Edward N. (ed.). The Stanford Encyclopedia of Philosophy. Metaphysics Research Lab, Stanford University. Retrieved 19 November 2017.
Floyd, Kory; Hesse, Colin; Mark A., Generous (2021). "Affection exchange theory: A bio-evolutionary look at affectionate communication". In Braithwaite, Dawn (ed.). Engaging theories in interpersonal communication: multiple perspectives (3rd ed.). New York, NY: Routledge. ISBN978-1-003-19551-1. OCLC1248603023.