Dyfyniad APA

ebrary, Inc. (2004). The hydrogen economy: Opportunities, costs, barriers, and R&D needs. National Academies Press.

Dyfyniad Arddull Chicago

ebrary, Inc. The Hydrogen Economy: Opportunities, Costs, Barriers, and R&D Needs. Washington, D.C.: National Academies Press, 2004.

Dyfyniad MLA

ebrary, Inc. The Hydrogen Economy: Opportunities, Costs, Barriers, and R&D Needs. National Academies Press, 2004.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.