APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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