Lua APA (7ú heag.)
Petersen, W., & Gregory R.W. (1939). Dairy science: Its principles and practice in production, management, and processing. J.B.L.
Lua i Stíl Chicago (17ú heag.)
Petersen, W.E, agus Gregory R.W. Dairy Science: Its Principles and Practice in Production, Management, and Processing. Chicago: J.B.L, 1939.
Lua MLA (9ú heag.)
Petersen, W.E, agus Gregory R.W. Dairy Science: Its Principles and Practice in Production, Management, and Processing. J.B.L, 1939.
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