APA (7e ed.) Bronvermelding
Avila, D. (1977). The helping relationship sourcebook (2nd ed.). Allyn and Bacon.
Chicago (17e ed.) Bronvermelding
Avila, Donald. The Helping Relationship Sourcebook. 2nd ed. Boston: Allyn and Bacon, 1977.
MLA (9e ed.) Bronvermelding
Avila, Donald. The Helping Relationship Sourcebook. 2nd ed. Allyn and Bacon, 1977.
Let op: Deze citaties zijn niet altijd 100% accuraat.