APA استشهاد

Hume, G., & Bayley, J. (1966). Manual of commercial correspondence (5th ed.). Sir Isaac Pitman and Sons.

استشهاد بنمط شيكاغو

Hume, G., و J.E Bayley. Manual of Commercial Correspondence. 5th ed. London: Sir Isaac Pitman and Sons, 1966.

MLA استشهاد

Hume, G., و J.E Bayley. Manual of Commercial Correspondence. 5th ed. Sir Isaac Pitman and Sons, 1966.