Dyfyniad APA

Bosticco, M. (1985). Instant business letters (2nd ed.). Gower.

Dyfyniad Arddull Chicago

Bosticco, Mary. Instant Business Letters. 2nd ed. Aldershot, Hants., Eng: Gower, 1985.

Dyfyniad MLA

Bosticco, Mary. Instant Business Letters. 2nd ed. Gower, 1985.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.