APA

Sage Publications, . (1986). Qualitative research methods. Beverly Hills, Calif. [u.a.]: Sage Publ.

Chicago

Sage Publications, . 1986. Qualitative research methods. Beverly Hills, Calif. [u.a.]: Sage Publ.

Harvard

Sage Publications, . (1986). Qualitative research methods. Beverly Hills, Calif. [u.a.]: Sage Publ.

MLA

Sage Publications, . Qualitative research methods. Beverly Hills, Calif. [u.a.]: Sage Publ. 1986.