Cita APA (7th ed.)
Apter, S. J. (1982). Troubled children troubled systems. Pergamon.
Cita Chicago (17th ed.)
Apter, Steven J. Troubled Children Troubled Systems. New York: Pergamon, 1982.
Cita MLA (9th ed.)
Apter, Steven J. Troubled Children Troubled Systems. Pergamon, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.