MLA

Frambach, Peter, et al. Mail : Business Communication. Kapellen: Pelckmans, 2002.

APA

Frambach, P., Hermans, E., Kockx, E., & Meijer, G. (2002). Mail : business communication. Kapellen: Pelckmans.

Chicago

Frambach, Peter, Eugeen Hermans, Eddy Kockx, and George Meijer. Mail: Business Communication. Kapellen: Pelckmans, 2002.