Cita APA (7th ed.)

Chang, V. N., Scott, S. T., & Decker, C. L. (2018). Developing helping skills: A step-by-step approach to competency (Third edition.). Cengage Learning.

Cita Chicago (17th ed.)

Chang, Valerie Nash, Sheryn Thompson Scott, i Carol L. Decker. Developing Helping Skills: A Step-by-step Approach to Competency. Third edition. Boston, MA: Cengage Learning, 2018.

Cita MLA (9th ed.)

Chang, Valerie Nash, et al. Developing Helping Skills: A Step-by-step Approach to Competency. Third edition. Cengage Learning, 2018.