Cita APA (7a ed.)

Coyle, G. L. (1948). Group work with American youth: A guide to the practice of leadership. Harper.

Cita Chicago Style (17a ed.)

Coyle, Grace Longwell. Group Work with American Youth: A Guide to the Practice of Leadership. New York: Harper, 1948.

Cita MLA (9a ed.)

Coyle, Grace Longwell. Group Work with American Youth: A Guide to the Practice of Leadership. Harper, 1948.