Cita APA (7th ed.)

Morgan, D. L., Krueger, R. A., & King, J. A. (1998). The Focus group kit. Sage.

Cita Chicago (17th ed.)

Morgan, David L., Richard A. Krueger, i Jean A. King. The Focus Group Kit. Thousand Oaks, Calif: Sage, 1998.

Cita MLA (9th ed.)

Morgan, David L., et al. The Focus Group Kit. Sage, 1998.