Dyfyniad APA

Morgan, D. L. (1993). Successful focus groups: Advancing the state of the art. Sage.

Dyfyniad Arddull Chicago

Morgan, David L. Successful Focus Groups: Advancing the State of the Art. Newbury Park, California: Sage, 1993.

Dyfyniad MLA

Morgan, David L. Successful Focus Groups: Advancing the State of the Art. Sage, 1993.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.