Gaya APA
ENERGIA : Spirit Indonesia Incorporated. (2013).
Jakarta:
PT. Pertamina Persero.
Gaya Chicago
ENERGIA : Spirit Indonesia Incorporated.
11.
Jakarta:
PT. Pertamina Persero,
2013.
.
Gaya MLA
ENERGIA : Spirit Indonesia Incorporated.
11.
Jakarta:
PT. Pertamina Persero,
2013.
.
Gaya Turabian
ENERGIA : Spirit Indonesia Incorporated.
Jakarta:
PT. Pertamina Persero,
2013.
.