Willis, S. (1999). Meeting the needs of homeless people with problematic drug or alcohol use. Social work monographs.
Chicago-Zitierstil (17. Ausg.)Willis, Susanna. "Meeting the Needs of Homeless People with Problematic Drug or Alcohol Use." Social Work Monographs 1999.
MLA-Zitierstil (8. Ausg.)Willis, Susanna. "Meeting the Needs of Homeless People with Problematic Drug or Alcohol Use." Social Work Monographs, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.