APA
Stein L., . (1949). Infancy of speech and the speech of infancy. London: Methuen & Co. Ltd.
Chicago
Stein Leopold, . 1949. Infancy of speech and the speech of infancy. London: Methuen & Co. Ltd.
Harvard
Stein L., . (1949). Infancy of speech and the speech of infancy. London: Methuen & Co. Ltd.
MLA
Stein Leopold, . Infancy of speech and the speech of infancy. London: Methuen & Co. Ltd. 1949.