Parrett, O. S. (1939). Diseases of food animals. Southern Publishing Ass.
Cita Chicago (17th ed.)Parrett, Owen S. Diseases of Food Animals. Southern Publishing Ass, 1939.
Cita MLA (9th ed.)Parrett, Owen S. Diseases of Food Animals. Southern Publishing Ass, 1939.
Atenció: Aquestes cites poden no estar 100% correctes.