Gaya APA

ZIEGLER, K. (1918). Report on the results of the Geological-Mining Exploration of the Kendi-Ringin Coalfield. . Bandung: Direktorat Batubara.

Gaya MLA

ZIEGLER, K.G.J.. "Report on the results of the Geological-Mining Exploration of the Kendi-Ringin Coalfield.". Bandung: Direktorat Batubara, 1918. Batubara.