Cita APA (7a ed.)

Stewart, D. W., & Shamdasani, P. N. (1990). Focus groups: Theory and practice. Sage.

Cita Chicago Style (17a ed.)

Stewart, David W., y Prem N. Shamdasani. Focus Groups: Theory and Practice. Newbury Park [etc.]: Sage, 1990.

Cita MLA (9a ed.)

Stewart, David W., y Prem N. Shamdasani. Focus Groups: Theory and Practice. Sage, 1990.