Cita APA

Hill, C. E. 1., & O'Brien, K. M. (2002). Helping skills: Facilitating exploration, insight, and action (1st ed., 6th printing.). Washington, DC: American Psychological Association.

Citación estilo Chicago

Hill, Clara E. 1948-, and Karen M. O'Brien. Helping Skills: Facilitating Exploration, Insight, and Action. 1st ed., 6th printing. Washington, DC: American Psychological Association, 2002.

Cita MLA

Hill, Clara E. 1948-, and Karen M. O'Brien. Helping Skills: Facilitating Exploration, Insight, and Action. 1st ed., 6th printing. Washington, DC: American Psychological Association, 2002.