APA Edition Citation

Valentine, C. W. (1959). The psychology of early childhood: A study of mental development in the first years of life (4ed.). Methuen & Co. Ltd..

Chicago Edition Citation

Valentine, C W. The Psychology of Early Childhood: A Study of Mental Development in the First Years of Life. 4ed. London: Methuen & Co. Ltd., 1959.

MLA Edition Citation

Valentine, C W. The Psychology of Early Childhood: A Study of Mental Development in the First Years of Life. 4ed. Methuen & Co. Ltd., 1959.