Educational psychology at the Cleveland meeting of the American Psychological Association
Baldwin, Bird T Bell, J. Carleton ; Bagley, W.C ; Seashore, C.E ; Whipple, Guy Montrose
Journal of educational psychology, 1913-03, Vol.4 (3), p.164-170 [Periódico revisado por pares]Washington, etc: Warwick & York
Texto completo disponível