Acosta Muñoz, J. F. (2013). Researching attitudes in school training abstract. Universidad Pedagógica y Tecnológica de Colombia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAcosta Muñoz, Julio Fernando. Researching Attitudes in School Training Abstract. Universidad Pedagógica y Tecnológica de Colombia, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAcosta Muñoz, Julio Fernando. Researching Attitudes in School Training Abstract. Universidad Pedagógica y Tecnológica de Colombia, 2013.
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