Lua APA (7ú heag.)

Vela-Esquivel, P. (2007). Stress and study, worrying combination. Universidad Autónoma de Tamaulipas.

Lua i Stíl Chicago (17ú heag.)

Vela-Esquivel, Paulina. Stress and Study, Worrying Combination. Universidad Autónoma de Tamaulipas, 2007.

Lua MLA (8ú heag.)

Vela-Esquivel, Paulina. Stress and Study, Worrying Combination. Universidad Autónoma de Tamaulipas, 2007.

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