Cita APA (7th ed.)

Bond, A., & Schuman, N. (2010). 300+ successful business letters for all occasions (3rd ed.). Barrons Educational Series, Inc..

Cita Chicago (17th ed.)

Bond, Alan, i Nancy Schuman. 300+ Successful Business Letters for All Occasions. 3rd ed. Hauppauge, NY: Barrons Educational Series, Inc., 2010.

Cita MLA (9th ed.)

Bond, Alan, i Nancy Schuman. 300+ Successful Business Letters for All Occasions. 3rd ed. Barrons Educational Series, Inc., 2010.