Gaya APA

Pertamina, . (1997). Environmental Protection, Occupational Health and Safety Management in Oi, Gas and Geothernal Activities . : Pertamina Governmnt.

Gaya MLA

Pertamina, . "Environmental Protection, Occupational Health and Safety Management in Oi, Gas and Geothernal Activities". : Pertamina Governmnt, 1997. Text.