Gaya APA
Egan, M, R. (1993).
Impact Of Air Velocity On The Development And Detection Of Small Coal Fire .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
Egan, Margaret, R..
"Impact Of Air Velocity On The Development And Detection Of Small Coal Fire".
Bandung:
Pusat Sumber Daya Geologi,
1993.
Batubara.