APA stil citiranja

Hopson, J. L., & Wessells, N. K. (1990). Essentials of biology: Essentials of biology. New-York: McGraw-Hill.

Chicago stil citiranja

Hopson, Janet L., and Norman K. Wessells. Essentials of biology: Essentials of biology. New-York: McGraw-Hill, 1990.

MLA stil citiranja

Hopson, Janet L., and Norman K. Wessells. Essentials of biology: Essentials of biology. New-York: McGraw-Hill, 1990.