Gaya APA
Oppenoorth, W., Gerth, H. (1929).
The Upper Eocene Nanggoelan Beds Near Djogjakarta .
Bogor:
N.V. Mij. Vorkink.
Gaya MLA
Oppenoorth, W.F.F.., Gerth, H..
"The Upper Eocene Nanggoelan Beds Near Djogjakarta".
Bogor:
N.V. Mij. Vorkink,
1929.
Text.