Cita APA (7th ed.)

Kaskel, A. (1988). Biology (3rd ed.). Merrill Pub. Co..

Cita Chicago (17th ed.)

Kaskel, Albert. Biology. 3rd ed. Columbus, Ohio: Merrill Pub. Co., 1988.

Cita MLA (9th ed.)

Kaskel, Albert. Biology. 3rd ed. Merrill Pub. Co., 1988.