Cita APA (7th ed.)

Gartside, L. (1974). Model business letters.: 2nd ed. ELBS.

Cita Chicago (17th ed.)

Gartside, L. Model Business Letters.: 2nd Ed. London: ELBS, 1974.

Cita MLA (9th ed.)

Gartside, L. Model Business Letters.: 2nd Ed. ELBS, 1974.