Cita APA (7th ed.)

(1991). Oceans and islands: The encyclopedia of the earth. Smithmark.

Cita Chicago (17th ed.)

Oceans and Islands: The Encyclopedia of the Earth. New York, N.Y: Smithmark, 1991.

Cita MLA (9th ed.)

Oceans and Islands: The Encyclopedia of the Earth. Smithmark, 1991.