APA (7th ed.) Citation

Shaaber, M. A. (1931). The art of writing business letters. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Shaaber, Matthias Adam. The Art of Writing Business Letters. New York: Houghton Mifflin, 1931.

MLA (9th ed.) Citation

Shaaber, Matthias Adam. The Art of Writing Business Letters. Houghton Mifflin, 1931.