Dyfyniad APA

(1978). Proceeding Of Iahs International Conference. University of Petroleum and Mi.

Dyfyniad Arddull Chicago

Proceeding Of Iahs International Conference. University of Petroleum and Mi, 1978.

Dyfyniad MLA

Proceeding Of Iahs International Conference. University of Petroleum and Mi, 1978.

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