APA (7th ed.) Citation

Geffner, A. B. (1982). How to write better business letters. Barron's.

Chicago Style (17th ed.) Citation

Geffner, Andrea B. How to Write Better Business Letters. New York, NY [u.a.]: Barron's, 1982.

MLA (9th ed.) Citation

Geffner, Andrea B. How to Write Better Business Letters. Barron's, 1982.