Παραπομπή σε μορφή APA (7η εκδ.)

Wilhelm Prince of Sweden. (1926). Among pygmies and gorillas with the Swedish zoological expedition to Central Africa, 1921 (New ed.). Dutton.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wilhelm Prince of Sweden. Among Pygmies and Gorillas with the Swedish Zoological Expedition to Central Africa, 1921. New ed. New York: Dutton, 1926.

Παραπομπή σε μορφή MLA (9th εκδ.)

Wilhelm Prince of Sweden. Among Pygmies and Gorillas with the Swedish Zoological Expedition to Central Africa, 1921. New ed. Dutton, 1926.