Dyfyniad APA

(1995). Bookbase: A guide to McGraw-Hill Publications. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Bookbase: A Guide to McGraw-Hill Publications. New York: McGraw-Hill, 1995.

Dyfyniad MLA

Bookbase: A Guide to McGraw-Hill Publications. New York: McGraw-Hill, 1995.

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