Παραπομπή APA

Gartside, L. (1981). Model business letters. Macdonald and evans ltd.

Παραπομπή Chicago Style

Gartside, L. Model Business Letters. London: Macdonald and evans ltd, 1981.

Παραπομπή MLA

Gartside, L. Model Business Letters. Macdonald and evans ltd, 1981.