Παραπομπή APA

Leah Brew & Jeffrey A Kottler. (2008). Applied helping skills. Sage.

Παραπομπή Chicago Style

Leah Brew και Jeffrey A Kottler. Applied Helping Skills. New Delhi: Sage, 2008.

Παραπομπή MLA

Leah Brew και Jeffrey A Kottler. Applied Helping Skills. Sage, 2008.