APA استشهاد

Cooper, J. P., & Wareing, P. F. (1971). Potential crop production: A case study. Heinemann Educational Books.

استشهاد بنمط شيكاغو

Cooper, J P., و P F. Wareing. Potential Crop Production: A Case Study. London: Heinemann Educational Books, 1971.

MLA استشهاد

Cooper, J P., و P F. Wareing. Potential Crop Production: A Case Study. Heinemann Educational Books, 1971.