Cita APA (7a ed.)

Frailey L.E & Mamchak Susan. (1993). Hanbook of Business Letters (3rd Edition.). Super Book House.

Cita Chicago Style (17a ed.)

Frailey L.E y Mamchak Susan. Hanbook of Business Letters. 3rd Edition. Bombay: Super Book House, 1993.

Cita MLA (9a ed.)

Frailey L.E y Mamchak Susan. Hanbook of Business Letters. 3rd Edition. Super Book House, 1993.