Gartside, L. (1987). Model business letters: A classified selection of modern business letters for use in schools and in business (3. ed., reprint.). Pitman.
Chicago-Zitierstil (17. Ausg.)Gartside, Leonard. Model Business Letters: A Classified Selection of Modern Business Letters for Use in Schools and in Business. 3. ed., reprint. London: Pitman, 1987.
MLA-Zitierstil (9. Ausg.)Gartside, Leonard. Model Business Letters: A Classified Selection of Modern Business Letters for Use in Schools and in Business. 3. ed., reprint. Pitman, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.