APA (7th ed.) Citation

Stroebe, W., Diehl, M., & Abakoumkin, G. (1991). The illusion of group effectivity. Psychologisches Inst.

Chicago Style (17th ed.) Citation

Stroebe, Wolfgang, Michael Diehl, and Georgios Abakoumkin. The Illusion of Group Effectivity. Tübingen: Psychologisches Inst, 1991.

MLA (9th ed.) Citation

Stroebe, Wolfgang, et al. The Illusion of Group Effectivity. Psychologisches Inst, 1991.