Gaya APA

Indonesia, I, A, G. (2002). The 31st annual convention Indonesian association of geologists PIT XXXI IAGI (volume II) (2nd vol). Surabaya: Ikatan Ahli Geologi Indonesia (IAGI).

Gaya MLA

Indonesia, Ikatan, Ahli, Geologi. "The 31st annual convention Indonesian association of geologists PIT XXXI IAGI (volume II)". 2nd vol Surabaya: Ikatan Ahli Geologi Indonesia (IAGI), 2002. Prosiding/Procceding.