APA
Robertson R. K., Lightfoot H. V., . (1950). Treatment of the backward child. London: Methuen & Co. Ltd.
Chicago
Robertson R K, Lightfoot H V, . 1950. Treatment of the backward child. London: Methuen & Co. Ltd.
Harvard
Robertson R. K., Lightfoot H. V., . (1950). Treatment of the backward child. London: Methuen & Co. Ltd.
MLA
Robertson R K, Lightfoot H V, . Treatment of the backward child. London: Methuen & Co. Ltd. 1950.