APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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