Dyfyniad APA

National Research Council (U.S.). Committee on Advanced Drilling Technologies. (1994). Drilling and excavation technologies for the future. National Academy Press, Washington, D.C. : National Academy Press.

Dyfyniad Arddull Chicago

National Research Council (U.S.). Committee on Advanced Drilling Technologies. Drilling and Excavation Technologies for the Future. Washington, D.C.: National Academy Press, Washington, D.C. : National Academy Press, 1994.

Dyfyniad MLA

National Research Council (U.S.). Committee on Advanced Drilling Technologies. Drilling and Excavation Technologies for the Future. National Academy Press, Washington, D.C. : National Academy Press, 1994.

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