Villarreal, D. (2006). Research as a change factor, interest and participation grows. Universidad Autónoma de Tamaulipas.
Chicago-viite (17. p.)Villarreal, Diana. Research as a Change Factor, Interest and Participation Grows. Universidad Autónoma de Tamaulipas, 2006.
MLA-viite (8. p.)Villarreal, Diana. Research as a Change Factor, Interest and Participation Grows. Universidad Autónoma de Tamaulipas, 2006.
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