Lua APA (7ú heag.)
ebrary, Inc. (2004). The hydrogen economy: Opportunities, costs, barriers, and R&D needs. National Academies Press.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc. The Hydrogen Economy: Opportunities, Costs, Barriers, and R&D Needs. Washington, D.C.: National Academies Press, 2004.
Lua MLA (9ú heag.)
ebrary, Inc. The Hydrogen Economy: Opportunities, Costs, Barriers, and R&D Needs. National Academies Press, 2004.
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