Dyfyniad APA
ebrary, Inc. (1995). Measuring and improving infrastructure performance. National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc. Measuring and Improving Infrastructure Performance. Washington, DC: National Academy Press, 1995.
Dyfyniad MLA
ebrary, Inc. Measuring and Improving Infrastructure Performance. National Academy Press, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.