Gaya APA

Kreaff, D, A. (1941). The Geology And The Asbestos Deposits Of The South-Eastern Arm Of Halmahera . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Kreaff, Drs., A.. "The Geology And The Asbestos Deposits Of The South-Eastern Arm Of Halmahera". Bandung: Pusat Sumber Daya Geologi, 1941. Logam.