APA Edition Citation

Simmonds, N. W. (1979). Principles of crop improvement. Longman Group Ltd.

Chicago Edition Citation

Simmonds, N W. Principles of Crop Improvement. London: Longman Group Ltd, 1979.

MLA Edition Citation

Simmonds, N W. Principles of Crop Improvement. Longman Group Ltd, 1979.

Warning: These citations may not always be 100% accurate.