APA (7th ed.) Citation

Montgomery, E. G., & Gregory, R. W. (1938). Productive farm crops (5th ed., rev.). J.B. Lippincott company.

Chicago Style (17th ed.) Citation

Montgomery, E. G., and R. W. Gregory. Productive Farm Crops. 5th ed., rev. Chicago, Philadelphia [etc.]: J.B. Lippincott company, 1938.

MLA (9th ed.) Citation

Montgomery, E. G., and R. W. Gregory. Productive Farm Crops. 5th ed., rev. J.B. Lippincott company, 1938.