Hastings, R., Remington, B., Hastings, R. P., Kovshoff, H., Degli Espinosa, F., Jahr, E., Brown, T., Alsford, P., Lemaic, M. & Ward, N.,
1 Tach 2007,
Yn: American Journal on Mental Retardation. 112,
6,
t. 418-438Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid