Cita APA (7a ed.)

Helm, T. (1961). Shark: Unpredictable killer of the sea. Dodd, Mead.

Cita Chicago Style (17a ed.)

Helm, Thomas. Shark: Unpredictable Killer of the Sea. New York: Dodd, Mead, 1961.

Cita MLA (9a ed.)

Helm, Thomas. Shark: Unpredictable Killer of the Sea. Dodd, Mead, 1961.