APA استشهاد

Penson, J. B. . .. (2016). Introduction to agricultural economics (6th ed.). Pearson.

استشهاد بنمط شيكاغو

Penson, John B. Introduction to Agricultural Economics. 6th ed. New Delhi: Pearson, 2016.

MLA استشهاد

Penson, John B. Introduction to Agricultural Economics. 6th ed. Pearson, 2016.