Cita APA (7th ed.)

(1993). Marine mammals of the world. s.n.].

Cita Chicago (17th ed.)

Marine Mammals of the World. [s.l: s.n.], 1993.

Cita MLA (9th ed.)

Marine Mammals of the World. s.n.], 1993.

Atenció: Aquestes cites poden no estar 100% correctes.