APA (7th ed.) Zitazioa

Tappan, H. (1980). The Paleobiology of plant protists. Freeman.

Chicago Style (17th ed.) Zitazioa

Tappan, Helen. The Paleobiology of Plant Protists. San Francisco: Freeman, 1980.

MLA (9th ed.) Zitazioa

Tappan, Helen. The Paleobiology of Plant Protists. Freeman, 1980.