APA (7th ed.) Citation

Simmonds, N. W., & Smartt, J. (1999). Principles of crop improvement (2nd ed.). Blackwell Science.

Chicago Style (17th ed.) Citation

Simmonds, N. W., and J. Smartt. Principles of Crop Improvement. 2nd ed. Osney Mead, Oxford: Blackwell Science, 1999.

MLA (9th ed.) Citation

Simmonds, N. W., and J. Smartt. Principles of Crop Improvement. 2nd ed. Blackwell Science, 1999.