APA način citiranja (7. izdanje)

Werz, E. W. (1993). The complete customer service letter book. McGraw-Hill.

Čikaški stil citiranja (17. izdanje)

Werz, Edward W. The Complete Customer Service Letter Book. New York: McGraw-Hill, 1993.

MLA način citiranja (9. izdanje)

Werz, Edward W. The Complete Customer Service Letter Book. McGraw-Hill, 1993.