Malaysia. (1999). Laporan tahunan = annual report Minerals and Geoscience Department Malaysia. Ministry of Primary Industries Malaysia.
Chicago-referens (17:e uppl.)Malaysia. Laporan Tahunan = Annual Report Minerals and Geoscience Department Malaysia. Kuala Lumpur: Ministry of Primary Industries Malaysia, 1999.
MLA-referens (8:e uppl.)Malaysia. Laporan Tahunan = Annual Report Minerals and Geoscience Department Malaysia. Ministry of Primary Industries Malaysia, 1999.
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