APA-viite (7. p.)

Wehr, J. D., & Sheath, R. G. (2003). Freshwater algae of North America: Ecology and classification. Academic Press.

Chicago-viite (17. p.)

Wehr, John D., ja Robert G. Sheath. Freshwater Algae of North America: Ecology and Classification. San Diego, Calif: Academic Press, 2003.

MLA-viite (9. p.)

Wehr, John D., ja Robert G. Sheath. Freshwater Algae of North America: Ecology and Classification. Academic Press, 2003.