APA استشهاد

Pearson, L. C. (1967). Principles of agronomy. Reinholdpublishing Corporation.

استشهاد بنمط شيكاغو

Pearson, Lorentz C. Principles of Agronomy. Newyork: Reinholdpublishing Corporation, 1967.

MLA استشهاد

Pearson, Lorentz C. Principles of Agronomy. Reinholdpublishing Corporation, 1967.