APA (7th ed.) Citation

Hay, R., & Walker, A. J. (1994). An introduction to the physiology of crop yield ([1st ed., repr.].). Longman.

Chicago Style (17th ed.) Citation

Hay, R.K.M, and Andrew J. Walker. An Introduction to the Physiology of Crop Yield. [1st ed., repr.]. Harlow: Longman, 1994.

MLA (9th ed.) Citation

Hay, R.K.M, and Andrew J. Walker. An Introduction to the Physiology of Crop Yield. [1st ed., repr.]. Longman, 1994.