Cita APA (7th ed.)

Farol, H. F. (1987). A manual of effective business correspondence. University Book Supply, Inc.

Cita Chicago (17th ed.)

Farol, Honesto F. A Manual of Effective Business Correspondence. Manila: University Book Supply, Inc, 1987.

Cita MLA (9th ed.)

Farol, Honesto F. A Manual of Effective Business Correspondence. University Book Supply, Inc, 1987.