Cita APA

Rafael J Engel & Russell K Schutt. (2013). The practice of research in social work. Sage.

Chicago Edition Citation

Rafael J Engel i Russell K Schutt. The Practice of Research in Social Work. Los Angeles: Sage, 2013.

Cita MLA

Rafael J Engel i Russell K Schutt. The Practice of Research in Social Work. Sage, 2013.