एपीए उद्धरण

Friedmann, W. (1971). The Future of the Oceans. Vakils, Feffer and Simons.

शिकागो स्टाइल उद्धरण

Friedmann, Wolfganc. The Future of the Oceans. Bombay: Vakils, Feffer and Simons, 1971.

एमएलए उद्धरण

Friedmann, Wolfganc. The Future of the Oceans. Vakils, Feffer and Simons, 1971.