Cita APA (7th ed.)

Gilbert, P. W. (1967). Sharks, skates, and rays. Johns Hopkins University Press.

Cita Chicago (17th ed.)

Gilbert, Perry W. Sharks, Skates, and Rays. Baltimore: Johns Hopkins University Press, 1967.

Cita MLA (9th ed.)

Gilbert, Perry W. Sharks, Skates, and Rays. Johns Hopkins University Press, 1967.