Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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