APA استشهاد

Poe, R. W. (1994). McGraw Hill handbook of business letters (3rd ed.). Mc Graw Hill.

استشهاد بنمط شيكاغو

Poe, Roy W. McGraw Hill Handbook of Business Letters. 3rd ed. New York: Mc Graw Hill, 1994.

MLA استشهاد

Poe, Roy W. McGraw Hill Handbook of Business Letters. 3rd ed. Mc Graw Hill, 1994.