Hardy, A. C. (1970). The open sea: Its natural history. Fontana.
Cita Chicago (17th ed.)Hardy, Alister Clavering. The Open Sea: Its Natural History. Fontana, 1970.
Cita MLA (9th ed.)Hardy, Alister Clavering. The Open Sea: Its Natural History. Fontana, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.