<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Plutchik, Robert.</hi> 1980a. „A General Psychoevolutionary Theoey of Emotion“. In <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Theories of Emotion</hi>, 3–33. Elsevier. https://doi.org/10.1016/B978-0-12-558701-3.50007-7.