Gaya APA
Widhiyatna, D, E, A. (2018).
Buletin: Sumber Daya Geologi Volume 13 No. 3 November 2018 .
Bandung:
Badan Geologi.
Gaya MLA
Widhiyatna, Denni.,, Et, Al..
"Buletin: Sumber Daya Geologi Volume 13 No. 3 November 2018".
Bandung:
Badan Geologi,
2018.
Text.