Nopakun, O. (1985). Thai concept of khit-pen for adult, and non-formal education. Asian and South Pacific Bureau of Adult Education.
Lua i Stíl Chicago (17ú heag.)Nopakun, Oonta. Thai Concept of Khit-pen for Adult, and Non-formal Education. Bankok: Asian and South Pacific Bureau of Adult Education, 1985.
Lua MLA (8ú heag.)Nopakun, Oonta. Thai Concept of Khit-pen for Adult, and Non-formal Education. Asian and South Pacific Bureau of Adult Education, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.