Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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