Παραπομπή APA

Harrison, J. (1964). Secretarial Duties (2nd ed.). Pitman.

Παραπομπή Chicago Style

Harrison, John. Secretarial Duties. 2nd ed. london: Pitman, 1964.

Παραπομπή MLA

Harrison, John. Secretarial Duties. 2nd ed. Pitman, 1964.