APA (7th ed.) Citation

Gottfried & Sandra S. (1993). Biology Today. Mosby-Year Book.

Chicago Style (17th ed.) Citation

Gottfried and Sandra S. Biology Today. St. Louis, MO: Mosby-Year Book, 1993.

MLA (9th ed.) Citation

Gottfried and Sandra S. Biology Today. Mosby-Year Book, 1993.

Warning: These citations may not always be 100% accurate.