APA

Patton M. Q., . (2015). Qualitative research & evaluation methods. Los Angeles: Sage.

Chicago

Patton Michael Quinn, . 2015. Qualitative research & evaluation methods. Los Angeles: Sage.

Harvard

Patton M. Q., . (2015). Qualitative research & evaluation methods. Los Angeles: Sage.

MLA

Patton Michael Quinn, . Qualitative research & evaluation methods. Los Angeles: Sage. 2015.