Παραπομπή σε μορφή APA (7η εκδ.)

Wichler, G. (1961). Charles Darwin: The founder of the theory of evolution and natural selection. Pergamon Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wichler, Gerhard. Charles Darwin: The Founder of the Theory of Evolution and Natural Selection. New York: Pergamon Press, 1961.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wichler, Gerhard. Charles Darwin: The Founder of the Theory of Evolution and Natural Selection. Pergamon Press, 1961.