Gaya APA

Soelistijo, U, W. (1990). Laporan Mengikuti 4th International Conference on Geoscience Information dan International Workshop on Information System for Small Scale Mining, 24-29 Juni 1990 di Ottawa, Canada . : Direktorat Jenderal Pertambangan Umum.

Gaya MLA

Soelistijo, Ukar, W.. "Laporan Mengikuti 4th International Conference on Geoscience Information dan International Workshop on Information System for Small Scale Mining, 24-29 Juni 1990 di Ottawa, Canada". : Direktorat Jenderal Pertambangan Umum, 1990. Text.