Schmuck, R. A., & Schmuck, P. A. (1979). Group processes in the classroom (3d ed.). W. C. Brown.
Citazione stile Chigago Style (17a edizione)Schmuck, Richard A., e Patricia A. Schmuck. Group Processes in the Classroom. 3d ed. Dubuque, Iowa: W. C. Brown, 1979.
Citatione MLA (9a ed.)Schmuck, Richard A., e Patricia A. Schmuck. Group Processes in the Classroom. 3d ed. W. C. Brown, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.