APA استشهاد

Gartside. (1967). Modern Business Correspondence/2e (2nd ed.). ELBS.

استشهاد بنمط شيكاغو

Gartside. Modern Business Correspondence/2e. 2nd ed. London: ELBS, 1967.

MLA استشهاد

Gartside. Modern Business Correspondence/2e. 2nd ed. ELBS, 1967.