Cita APA (7a ed.)

Krogh, D. (2005). Biology: A guide to the natural world (3rd ed.). Pearson/Prentice Hall.

Cita Chicago Style (17a ed.)

Krogh, David. Biology: A Guide to the Natural World. 3rd ed. Upper Saddle River, New Jersey: Pearson/Prentice Hall, 2005.

Cita MLA (9a ed.)

Krogh, David. Biology: A Guide to the Natural World. 3rd ed. Pearson/Prentice Hall, 2005.