APA استشهاد

Leorard, W. H., Martin, J. H., & Stamp, D. L. (1975). Principles of field crop production (Ed.3.).

استشهاد بنمط شيكاغو

Leorard, Warren H., John H. Martin, و David L. Stamp. Principles of Field Crop Production. Ed.3. New York, Macmillan, 1975.

MLA استشهاد

Leorard, Warren H., et al. Principles of Field Crop Production. Ed.3. 1975.