Heinstein, M. L. (1969). Behavior problems of young children in California. s.n.
Cita Chicago (17th ed.)Heinstein, Martin L. Behavior Problems of Young Children in California. S.l: s.n, 1969.
Cita MLA (9th ed.)Heinstein, Martin L. Behavior Problems of Young Children in California. s.n, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.