Žagar, I. Ž., Kelava, P., & Radovan, M. (2014). From formal to non-formal: Education, learning and knowledge. Cambridge Scholars Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रŽagar, Igor Ž, Polona Kelava, और Marko Radovan. From Formal to Non-formal: Education, Learning and Knowledge. Newcastle upon Tyne, England: Cambridge Scholars Publishing, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रŽagar, Igor Ž, et al. From Formal to Non-formal: Education, Learning and Knowledge. Cambridge Scholars Publishing, 2014.
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