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Hall, G.S., (1904). Adolescence: Its Psychology, and Its Relations to Physiology, Anthropology, Sociology, Sex, Crime, Religion and Education: (2 Vols). New York : Appleton-Century-Crofts.

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http://eprints.utm.my/2288/1/lepak.pdf

http://eprints.utm.my/3864/1/Azizi_lepak.pdf

http://ms.wikipedia.org/wiki/Budaya_lepak

http://www.angelfire.com/mi/salleh/lepak.htm