Dyfyniad APA
ebrary, Inc. (1989). An International directory of building research organizations. National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc. An International Directory of Building Research Organizations. Washington, D.C.: National Academy Press, 1989.
Dyfyniad MLA
ebrary, Inc. An International Directory of Building Research Organizations. National Academy Press, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.