Cita APA (7th ed.)

Villee, C. A., Solomon, E. P., Martin, C. E., Martin, D. W., Berg, L. R., & Davis, P. W. (1989). Biology (Second edition.). Saunders.

Cita Chicago (17th ed.)

Villee, Claude A., Eldra Pearl Solomon, Charles E. Martin, Diana W. Martin, Linda R. Berg, i P. William Davis. Biology. Second edition. Philadelphia: Saunders, 1989.

Cita MLA (9th ed.)

Villee, Claude A., et al. Biology. Second edition. Saunders, 1989.