Cita APA (7th ed.)
Wallace, B., & Simmons, G. M. (1987). Biology for living. Johns Hopkins University Press.
Cita Chicago (17th ed.)
Wallace, Bruce, i George M. Simmons. Biology for Living. Baltimore: Johns Hopkins University Press, 1987.
Cita MLA (9th ed.)
Wallace, Bruce, i George M. Simmons. Biology for Living. Johns Hopkins University Press, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.