Cita APA (7th ed.)

Patton, M. Q. (1990). Qualitative evaluation and research methods (2nd ed.). Sage Publications.

Cita Chicago (17th ed.)

Patton, Michael Quinn. Qualitative Evaluation and Research Methods. 2nd ed. Newbury Park, Calif: Sage Publications, 1990.

Cita MLA (9th ed.)

Patton, Michael Quinn. Qualitative Evaluation and Research Methods. 2nd ed. Sage Publications, 1990.