Cita APA (7a ed.)

Trecker, H. B. (1955). Social group work: Principles and practices (Rev. and enl.). Whiteside.

Cita Chicago Style (17a ed.)

Trecker, Harleigh Bradley. Social Group Work: Principles and Practices. Rev. and enl. New York: Whiteside, 1955.

Cita MLA (9a ed.)

Trecker, Harleigh Bradley. Social Group Work: Principles and Practices. Rev. and enl. Whiteside, 1955.