APA (7th ed.) Citation

Lange, O. (1991). Geologi umum. Gaya Media Pratama.

Chicago Style (17th ed.) Citation

Lange, O. Geologi Umum. Gaya Media Pratama, 1991.

MLA (8th ed.) Citation

Lange, O. Geologi Umum. Gaya Media Pratama, 1991.

Warning: These citations may not always be 100% accurate.