Dyfyniad APA

Thimons, H. F., & H.H. Fields. (1976). Coal: Current Advances in Mining Techniques. M.S.S.

Dyfyniad Arddull Chicago

Thimons, H.U. Friadrich, and H.H. Fields. Coal: Current Advances in Mining Techniques. New York: M.S.S, 1976.

Dyfyniad MLA

Thimons, H.U. Friadrich, and H.H. Fields. Coal: Current Advances in Mining Techniques. M.S.S, 1976.

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