Dyfyniad APA

World Data Center A for Glaciology & Hoffman, C. S. (1980). Great Lakes ice. World Data Center A for Glaciology (Snow and Ice), Institute for Arctic and Alpine Research, University of Colorado.

Dyfyniad Arddull Chicago

World Data Center A for Glaciology and Claire S. Hoffman. Great Lakes Ice. Boulder, Colo.: World Data Center A for Glaciology (Snow and Ice), Institute for Arctic and Alpine Research, University of Colorado, 1980.

Dyfyniad MLA

World Data Center A for Glaciology and Claire S. Hoffman. Great Lakes Ice. World Data Center A for Glaciology (Snow and Ice), Institute for Arctic and Alpine Research, University of Colorado, 1980.

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