Trait and state motivation and the acquisition of Hebrew vocabulary
Canadian Journal of Behavioural Science / Revue canadienne des sciences du comportement (1995) - Comment
doi: 10.1037/0008-400x.27.3.356  issn: 1879-2669  issn: 0008-400x 

Paul F. Tremblay, Michelle P. Goldberg, R. C. Gardner