Varela-López, L. J. (2008). University students with hearts of children. Universidad Autónoma de Tamaulipas.
Čikaški stil citiranja (17. izdanje)Varela-López, Luis Jesús. University Students with Hearts of Children. Universidad Autónoma de Tamaulipas, 2008.
MLA način citiranja (8. izdanje)Varela-López, Luis Jesús. University Students with Hearts of Children. Universidad Autónoma de Tamaulipas, 2008.
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