Cita APA (7th ed.)
Halpern, W. I., & Kissel, S. (1976). Human resources for troubled children.
Cita Chicago (17th ed.)
Halpern, Werner I., i Stanley Kissel. Human Resources for Troubled Children. 1976.
Cita MLA (9th ed.)
Halpern, Werner I., i Stanley Kissel. Human Resources for Troubled Children. 1976.
Atenció: Aquestes cites poden no estar 100% correctes.