Citace podle APA (7th ed.)
Petersen, W., & Gregory R.W. (1939). Dairy science: Its principles and practice in production, management, and processing. J.B.L.
Citace podle Chicago (17th ed.)
Petersen, W.E, a Gregory R.W. Dairy Science: Its Principles and Practice in Production, Management, and Processing. Chicago: J.B.L, 1939.
Citace podle MLA (9th ed.)
Petersen, W.E, a Gregory R.W. Dairy Science: Its Principles and Practice in Production, Management, and Processing. J.B.L, 1939.
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