APA استشهاد

Ashley, A. (1992). Handbook of commercial correspondence (2nd ed.). OUP.

استشهاد بنمط شيكاغو

Ashley, A. Handbook of Commercial Correspondence. 2nd ed. Oxford: OUP, 1992.

MLA استشهاد

Ashley, A. Handbook of Commercial Correspondence. 2nd ed. OUP, 1992.