Lua APA (7ú heag.)

-. (1991). Proceedings the twentieth annual convention. Ikatan Ahli Geologi Indonesia.

Lua i Stíl Chicago (17ú heag.)

-. Proceedings the Twentieth Annual Convention. Ikatan Ahli Geologi Indonesia, 1991.

Lua MLA (8ú heag.)

-. Proceedings the Twentieth Annual Convention. Ikatan Ahli Geologi Indonesia, 1991.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.