Cita APA (7th ed.)

Patton, M. Q. (1990). Qualitative evaluation and research methods. Sage.

Cita Chicago (17th ed.)

Patton, Michael Quinn. Qualitative Evaluation and Research Methods. Newbury Park, London: Sage, 1990.

Cita MLA (9th ed.)

Patton, Michael Quinn. Qualitative Evaluation and Research Methods. Sage, 1990.