APA način citiranja (7. izdanje)
ebrary, Inc. (1999). How abundant?: Assessing the estimates of natural gas supply. Environmental Law Institute.
Čikaški stil citiranja (17. izdanje)
ebrary, Inc. How Abundant?: Assessing the Estimates of Natural Gas Supply. Washington, D.C.: Environmental Law Institute, 1999.
MLA način citiranja (9. izdanje)
ebrary, Inc. How Abundant?: Assessing the Estimates of Natural Gas Supply. Environmental Law Institute, 1999.
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