Pakistan. Directorate General of Energy Resources. Energy year book. Govt. of Pakistan, Directorate General of Energy Resources, Ministry of Petroleum & Natural Resources.
Čikaški stil citiranja (17. izdanje)Pakistan. Directorate General of Energy Resources. Energy Year Book. Islamabad: Govt. of Pakistan, Directorate General of Energy Resources, Ministry of Petroleum & Natural Resources.
MLA način citiranja (8. izdanje)Pakistan. Directorate General of Energy Resources. Energy Year Book. Govt. of Pakistan, Directorate General of Energy Resources, Ministry of Petroleum & Natural Resources.
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