National Research Council (U.S.). Committee on Understanding the Impact of Selling the Helium Reserve & ebrary, Inc. (2010). Selling the nation's helium reserve. National Academies Press.
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Chicago Style (17th ed.) Zitazioa
National Research Council (U.S.). Committee on Understanding the Impact of Selling the Helium Reserve eta Inc ebrary. Selling the Nation's Helium Reserve. Washington, D.C.: National Academies Press, 2010.
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MLA (9th ed.) Zitazioa
National Research Council (U.S.). Committee on Understanding the Impact of Selling the Helium Reserve eta Inc ebrary. Selling the Nation's Helium Reserve. National Academies Press, 2010.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.