Farol, H. F. (1987). A manual of effective business correspondence. University Book Supply, Inc.
Chicago Style (17. basım) AtıfFarol, Honesto F. A Manual of Effective Business Correspondence. Manila: University Book Supply, Inc, 1987.
MLA (9th ed.) AtıfFarol, Honesto F. A Manual of Effective Business Correspondence. University Book Supply, Inc, 1987.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..