Friedmann, W. (1971). The future of the oceans. George Braziller.
Cita Chicago (17th ed.)Friedmann, Wolfgang. The Future of the Oceans. New York, New York: George Braziller, 1971.
Cita MLA (9th ed.)Friedmann, Wolfgang. The Future of the Oceans. George Braziller, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.