APA (7th ed.) Citation

Petersen, W., & Gregory R.W. (1939). Dairy science: Its principles and practice in production, management, and processing. J.B.L.

Chicago Style (17th ed.) Citation

Petersen, W.E, and Gregory R.W. Dairy Science: Its Principles and Practice in Production, Management, and Processing. Chicago: J.B.L, 1939.

MLA (9th ed.) Citation

Petersen, W.E, and Gregory R.W. Dairy Science: Its Principles and Practice in Production, Management, and Processing. J.B.L, 1939.