Dyfyniad APA

National Academy of Engineering & ebrary, Inc. (2011). Memorial tributes. National Academies Press.

Dyfyniad Arddull Chicago

National Academy of Engineering and Inc ebrary. Memorial Tributes. Washington: National Academies Press, 2011.

Dyfyniad MLA

National Academy of Engineering and Inc ebrary. Memorial Tributes. National Academies Press, 2011.

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