Cita APA

Chang, V. N., Scott, S. T., & Decker, C. L. (2009). Developing helping skills: A step-by-step approach. Brooks/Cole Cengage Learning.

Citación estilo Chicago

Chang, Valerie Nash, Sheryn Thompson Scott, and Carol L. Decker. Developing Helping Skills: A Step-by-step Approach. Belmont, Calif: Brooks/Cole Cengage Learning, 2009.

Cita MLA

Chang, Valerie Nash, et al. Developing Helping Skills: A Step-by-step Approach. Brooks/Cole Cengage Learning, 2009.