Gaya APA
J.ZWIERZYKI, . (1933).
The Stratighraphy Of The Coal and oil fields In The Netherlands East Indies .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
J.ZWIERZYKI, .
"The Stratighraphy Of The Coal and oil fields In The Netherlands East Indies".
Bandung:
Pusat Sumber Daya Geologi,
1933.
Batubara.