MLA

Riener,Gerhard, and Wiederhold,Simon Wiederhold,Simon. Heterogeneous Treatment Effects In Groups. Düsseldorf: DICE, 2012.

APA

Riener,Gerhard, R., & Wiederhold,Simon, W. (2012). Heterogeneous treatment effects in groups. Düsseldorf: DICE.

Chicago

Riener,Gerhard, and Wiederhold,Simon Wiederhold,Simon. Heterogeneous Treatment Effects In Groups. Düsseldorf: DICE, 2012.