Cita APA (7th ed.)

Harrison, H. (1988). Secretariel duties (8th.). Pitman.

Cita Chicago (17th ed.)

Harrison, Helen. Secretariel Duties. 8th. London: Pitman, 1988.

Cita MLA (9th ed.)

Harrison, Helen. Secretariel Duties. 8th. Pitman, 1988.