Cita APA (7th ed.)
ebrary, Inc. (1992). The National energy modeling system. National Academy Press.
Cita Chicago (17th ed.)
ebrary, Inc. The National Energy Modeling System. Washington, D.C.: National Academy Press, 1992.
Cita MLA (9th ed.)
ebrary, Inc. The National Energy Modeling System. National Academy Press, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.