Gaya APA

Yalom, I, D., Swanson, C, P. (1975). The theory and practice of group psychotheraphy . New York: New York: Basic Books; 1975.

Gaya MLA

Yalom, Irvin, D.., Swanson, Carl, P.. "The theory and practice of group psychotheraphy". New York: New York: Basic Books; 1975, 1975. Text.