Παραπομπή APA

Hurlock, E. B. (1956). Child development. McGraw-Hill Book co..

Παραπομπή Chicago Style

Hurlock, Elizabeth B. Child Development. New York: McGraw-Hill Book co., 1956.

Παραπομπή MLA

Hurlock, Elizabeth B. Child Development. McGraw-Hill Book co., 1956.