Gaya APA

Tjetjep, W, S. (1997). International Workshop Program And Abstract : Merapi Decade Volcano International Workshop II (2). Yogyakarta: Merapi Decade Volcano.

Gaya MLA

Tjetjep, Wimpy, S. "International Workshop Program And Abstract : Merapi Decade Volcano International Workshop II". 2 Yogyakarta: Merapi Decade Volcano, 1997. Text.