Gaya APA
Energia, No.11/Thn XLVIII/November 2013
.
(2013).
Yogyakarta:
Corporate Communication Pertamina.
Gaya MLA
Energia, No.11/Thn XLVIII/November 2013
.
.
Yogyakarta:
Corporate Communication Pertamina,
2013.
Majalah Populer.