Corey, M. S., & Corey, G. (2007). Becoming a helper. Belmont, CA: Thomson Higher Education.
Chicago Style citaatCorey, Marianne Schneider, en Gerald Corey. Becoming a Helper. Belmont, CA: Thomson Higher Education, 2007.
MLA citatieCorey, Marianne Schneider, en Gerald Corey. Becoming a Helper. Belmont, CA: Thomson Higher Education, 2007.
Let op: Deze citaties zijn niet altijd 100% accuraat.