APA (7e ed.) Bronvermelding

Hay, R. K. M., & Porter, J. R. (2006). The physiology of crop yield (Second edition.). Blackwell Publishing.

Chicago (17e ed.) Bronvermelding

Hay, Robert K. M., en John R. Porter. The Physiology of Crop Yield. Second edition. Oxford, UK: Blackwell Publishing, 2006.

MLA (8e ed.) Bronvermelding

Hay, Robert K. M., en John R. Porter. The Physiology of Crop Yield. Second edition. Blackwell Publishing, 2006.