Gaya APA
Khairul Rizal, Ifnaldi Sikumbang. (2000).
Petropages Directory 2000 .
Jakarta:
Petropages.
Gaya Chicago
Khairul Rizal, Ifnaldi Sikumbang.
Petropages Directory 2000.
Jakarta:
Petropages,
2000.
Text.
Gaya MLA
Khairul Rizal, Ifnaldi Sikumbang.
Petropages Directory 2000.
Jakarta:
Petropages,
2000.
Text.
Gaya Turabian
Khairul Rizal, Ifnaldi Sikumbang.
Petropages Directory 2000.
Jakarta:
Petropages,
2000.
Print.