APA استشهاد

Stephenson, J. (1977). Principles and Practice of Commercial Correspondance (3rd ed.). wheeler.

استشهاد بنمط شيكاغو

Stephenson, James. Principles and Practice of Commercial Correspondance. 3rd ed. Allahabad: wheeler, 1977.

MLA استشهاد

Stephenson, James. Principles and Practice of Commercial Correspondance. 3rd ed. wheeler, 1977.