Cita APA (7a ed.)
Hackney, H. L. (2009). The professional counselor. Pearson Education Ltd.
Cita Chicago Style (17a ed.)
Hackney, Harold L. The Professional Counselor. New Jersey: Pearson Education Ltd, 2009.
Cita MLA (9a ed.)
Hackney, Harold L. The Professional Counselor. Pearson Education Ltd, 2009.
Precaución: Estas citas no son 100% exactas.