Cita APA (7th ed.)
Witzel, A., & Reiter, H. (2012). The problem-centred interview. Sage.
Cita Chicago (17th ed.)
Witzel, Andreas, i Herwig Reiter. The Problem-centred Interview. Thousand Oaks, Calif: Sage, 2012.
Cita MLA (9th ed.)
Witzel, Andreas, i Herwig Reiter. The Problem-centred Interview. Sage, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.