APA (7e ed.) Bronvermelding
Rubin, A., & Babbie, E. (1997). Research methods for social work (3rd ed.). Brooks/Cole.
Chicago (17e ed.) Bronvermelding
Rubin, Allen, en Earl Babbie. Research Methods for Social Work. 3rd ed. Pacific Grove: Brooks/Cole, 1997.
MLA (9e ed.) Bronvermelding
Rubin, Allen, en Earl Babbie. Research Methods for Social Work. 3rd ed. Brooks/Cole, 1997.
Let op: Deze citaties zijn niet altijd 100% accuraat.