APA (7th ed.) Citation

Chang, V. N., Decker, C. L., & Scott, S. T. (2013). Developing helping skills: A step-by-step approach to competency (2nd ed.). Cengage Learning.

Chicago Style (17th ed.) Citation

Chang, Valerie Nash, Carol L. Decker, and Sheryn T. Scott. Developing Helping Skills: A Step-by-step Approach to Competency. 2nd ed. Belmont, CA: Cengage Learning, 2013.

MLA (9th ed.) Citation

Chang, Valerie Nash, et al. Developing Helping Skills: A Step-by-step Approach to Competency. 2nd ed. Cengage Learning, 2013.