Cita APA (7a ed.)

Shull, A. F., Larue, G. R., & Ruthven, A. G. (1920). Principles of animal biology (1st edition.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Shull, A. Franklin, George R. Larue, y Alexander G. Ruthven. Principles of Animal Biology. 1st edition. New York: McGraw-Hill, 1920.

Cita MLA (8a ed.)

Shull, A. Franklin, et al. Principles of Animal Biology. 1st edition. McGraw-Hill, 1920.