Hurlock, E. B. (1978). Child development (6th ed.). McGraw-Hill National Book Store.
Cita Chicago (17th ed.)Hurlock, Elizabeth B. Child Development. 6th ed. New York, [Manila: McGraw-Hill National Book Store, 1978.
Cita MLA (9th ed.)Hurlock, Elizabeth B. Child Development. 6th ed. McGraw-Hill National Book Store, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.