Pipeline & Gas Journal. Gulf Energy Information.
Chicago Style (17. basım) AtıfPipeline & Gas Journal. Gulf Energy Information.
MLA (8th ed.) AtıfPipeline & Gas Journal. Gulf Energy Information.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..
Pipeline & Gas Journal. Gulf Energy Information.
Chicago Style (17. basım) AtıfPipeline & Gas Journal. Gulf Energy Information.
MLA (8th ed.) AtıfPipeline & Gas Journal. Gulf Energy Information.