u're talking about from an immigrant with PR status to become a full-fledged malaysian citizen?

try here

if u read the wiki thoroughly, u'll find a link to where u can read on the procedures and apply for citizenship . here, i'll save u the trouble:

http://www.jpn.gov.my/2_2_6_warganegara_21tahun.php

there's a link for the english version if u cant read BM.