APA استشهاد

Ludlow,Ron, & Panton,Fergus. (2002). Essence of effective communication. Prentice Hall.

استشهاد بنمط شيكاغو

Ludlow,Ron, و Panton,Fergus. Essence of Effective Communication. New Delhi: Prentice Hall, 2002.

MLA استشهاد

Ludlow,Ron, و Panton,Fergus. Essence of Effective Communication. Prentice Hall, 2002.