Essentials of biology /
Janet L. Hopson, Norman K. Wessells.

APA Citation

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

MLA Citation

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

Warning: These citations may not always be complete (especially for serials).