Cita APA (7th ed.)

Cowen, R. (1960). Frontiers of the sea: The story of oceanographic exploration. Doubleday.

Cita Chicago (17th ed.)

Cowen, Robert. Frontiers of the Sea: The Story of Oceanographic Exploration. Nueva York: Doubleday, 1960.

Cita MLA (9th ed.)

Cowen, Robert. Frontiers of the Sea: The Story of Oceanographic Exploration. Doubleday, 1960.