Simmonds, N. (1979). Principles of crop improvement. London: Longman.
Trích dẫn kiểu ChicagoSimmonds, N.W. Principles of Crop Improvement. London: Longman, 1979.
MLA引文Simmonds, N.W. Principles of Crop Improvement. London: Longman, 1979.
警告:這些引文格式不一定是100%准確.