APA (7th ed.) Citation

Gregory, R. W., Card, D. G., Kempster, H. L., & Doyle, L. P. (1938). Poultry problems in production, marketing, and management. J.B. Lippincott Co.

Chicago Style (17th ed.) Citation

Gregory, R. W., Dana George Card, Harry Laverne Kempster, and Leo Philip Doyle. Poultry Problems in Production, Marketing, and Management. Chicago, Philadelphia [etc.]: J.B. Lippincott Co, 1938.

MLA (8th ed.) Citation

Gregory, R. W., et al. Poultry Problems in Production, Marketing, and Management. J.B. Lippincott Co, 1938.