Cita APA (7th ed.)
Keeton, W. T., & Bensadoun, P. D. (1969). Elements of Biological science. W.W. Norton & Co.
Cita Chicago (17th ed.)
Keeton, William T., i Paula DiSanto Bensadoun. Elements of Biological Science. New York: W.W. Norton & Co, 1969.
Cita MLA (9th ed.)
Keeton, William T., i Paula DiSanto Bensadoun. Elements of Biological Science. W.W. Norton & Co, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.