APA

Hartford M. E., . (19721971). Groups in social work: application of small group theory and research to social work practice. New York: Columbia University Press.

Chicago

Hartford Margaret E, . 19721971. Groups in social work: application of small group theory and research to social work practice. New York: Columbia University Press.

Harvard

Hartford M. E., . (19721971). Groups in social work: application of small group theory and research to social work practice. New York: Columbia University Press.

MLA

Hartford Margaret E, . Groups in social work: application of small group theory and research to social work practice. New York: Columbia University Press. 19721971.