Παραπομπή APA

Konopka Gisela. (1963). Social group work: A helping process. Prentice-Hall.

Παραπομπή Chicago Style

Konopka Gisela. Social Group Work: A Helping Process. New Jersey: Prentice-Hall, 1963.

Παραπομπή MLA

Konopka Gisela. Social Group Work: A Helping Process. Prentice-Hall, 1963.