Gaya APA
Observatory, M, V. (1985).
Merapi Monthly Report (M. M. R) May, June, July 1985 (Juli 1985).
Yogyakarta:
Merapi Volcano Observatory.
Gaya MLA
Observatory, Merapi, Volcano.
"Merapi Monthly Report (M. M. R) May, June, July 1985".
Juli 1985
Yogyakarta:
Merapi Volcano Observatory,
1985.
Text.