Lembaga Geologi dan Pertambangan Nasional. Bulletin of National Institute of Geology and Mining, Bandung. Indonesian Institute of Sciences.
Lua i Stíl Chicago (17ú heag.)Lembaga Geologi dan Pertambangan Nasional. Bulletin of National Institute of Geology and Mining, Bandung. Bandung: Indonesian Institute of Sciences.
Lua MLA (8ú heag.)Lembaga Geologi dan Pertambangan Nasional. Bulletin of National Institute of Geology and Mining, Bandung. Indonesian Institute of Sciences.
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