Gaya APA

Rahardjo, W. et al (1992). Indonesian Association of Geologists Post Convention Field Trip 1992 Merapi - Sabo Area (December 1992). Bandung: Ikatan Ahli Geologi Indonesia.

Gaya MLA

Rahardjo, Wartono. et al. "Indonesian Association of Geologists Post Convention Field Trip 1992 Merapi - Sabo Area". December 1992 Bandung: Ikatan Ahli Geologi Indonesia, 1992. Text.