Gaya APA

Surdradjat, D, A. (1993). Report On The Joint Mineral Exploration In The Pacitan-Ponorogo Area, East Java The Republic Of Indonesia . Bandung: korea mining promotion corporation.

Gaya MLA

Surdradjat, Dr., Adjat. "Report On The Joint Mineral Exploration In The Pacitan-Ponorogo Area, East Java The Republic Of Indonesia". Bandung: korea mining promotion corporation, 1993. Logam.