APA استشهاد

Forsyth, P. (2004). Marketing and selling professional services/3e (3rd ed.). Kogan page.

استشهاد بنمط شيكاغو

Forsyth, Patrick. Marketing and Selling Professional Services/3e. 3rd ed. New Delhi: Kogan page, 2004.

MLA استشهاد

Forsyth, Patrick. Marketing and Selling Professional Services/3e. 3rd ed. Kogan page, 2004.