Cita APA (7th ed.)

Oeftering, T., Fleck, M., & Papastefanou, G. (2011). GESIS-Technical Reports. GESIS.

Cita Chicago (17th ed.)

Oeftering, Thomas, Matthias Fleck, i Georgios Papastefanou. GESIS-Technical Reports. Mannheim: GESIS, 2011.

Cita MLA (8th ed.)

Oeftering, Thomas, et al. GESIS-Technical Reports. GESIS, 2011.