FAO. (1974). Otter board design and performance. Food and Agriculture Organization of the United Nations.
Cita Chicago (17th ed.)FAO. Otter Board Design and Performance. Roma: Food and Agriculture Organization of the United Nations, 1974.
Cita MLA (9th ed.)FAO. Otter Board Design and Performance. Food and Agriculture Organization of the United Nations, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.