Cita APA (7th ed.)

Geffner, A. B. (2000). How to write better business letters (3rd ed.). Barron's.

Cita Chicago (17th ed.)

Geffner, Andrea B. How to Write Better Business Letters. 3rd ed. Hauppauge, N.Y: Barron's, 2000.

Cita MLA (9th ed.)

Geffner, Andrea B. How to Write Better Business Letters. 3rd ed. Barron's, 2000.