Cita APA (7th ed.)

Morgan, D. L., & Krueger, R. A. (1998). Focus group kit. SAGE.

Cita Chicago (17th ed.)

Morgan, David L., i Richard A. Krueger. Focus Group Kit. Thousand Oaks, California: SAGE, 1998.

Cita MLA (9th ed.)

Morgan, David L., i Richard A. Krueger. Focus Group Kit. SAGE, 1998.