Liebert, R. (1966). Student conduct and social freedom. United States National Student Association.
Cita Chicago Style (17a ed.)Liebert, Roland. Student Conduct and Social Freedom. Washington: United States National Student Association, 1966.
Cita MLA (9a ed.)Liebert, Roland. Student Conduct and Social Freedom. United States National Student Association, 1966.
Precaución: Estas citas no son 100% exactas.