Dyfyniad APA

Day, R. W. (2012). Geotechnical engineer's portable handbook (Second edition.). McGraw Hill.

Dyfyniad Arddull Chicago

Day, Robert W. Geotechnical Engineer's Portable Handbook. Second edition. New York: McGraw Hill, 2012.

Dyfyniad MLA

Day, Robert W. Geotechnical Engineer's Portable Handbook. Second edition. McGraw Hill, 2012.

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