Gaya APA

Purbohadiwidjojo, M, S. (1919). Report On The Geological-Mining Investigation Of The Coal Field North Of Muara Teweh In The District Of Dusunland Of The Rest. Of The Southern And Eastern District Of Kalimantan . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Purbohadiwidjojo, Mrs., S.W.. "Report On The Geological-Mining Investigation Of The Coal Field North Of Muara Teweh In The District Of Dusunland Of The Rest. Of The Southern And Eastern District Of Kalimantan". Bandung: Pusat Sumber Daya Geologi, 1919. Batubara.