Gaya APA
Lefevre, P, T. (1999).
Coal And Natural Gas Competition In APEC Economies .
Bandung:
Center for Energy-Environment & Development.
Gaya MLA
Lefevre, Prof., Thierry.
"Coal And Natural Gas Competition In APEC Economies".
Bandung:
Center for Energy-Environment & Development,
1999.
Batubara.