Cita APA (7th ed.)

Lüttinger, P., & Wolf, C. (2011). GESIS-Technical Reports. GESIS.

Cita Chicago (17th ed.)

Lüttinger, Paul, i Christof Wolf. GESIS-Technical Reports. Mannheim: GESIS, 2011.

Cita MLA (8th ed.)

Lüttinger, Paul, i Christof Wolf. GESIS-Technical Reports. GESIS, 2011.