Nopakun, O. (1985). Thai concept of khit-pen for adult, and non-formal education. Asian and South Pacific Bureau of Adult Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNopakun, Oonta. Thai Concept of Khit-pen for Adult, and Non-formal Education. Bankok: Asian and South Pacific Bureau of Adult Education, 1985.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNopakun, Oonta. Thai Concept of Khit-pen for Adult, and Non-formal Education. Asian and South Pacific Bureau of Adult Education, 1985.
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