Dyfyniad APA

O'Leary, T. J. (1991). Computing essentials: Annual Edition 1991-1992. McGraw-Hill.

Dyfyniad Arddull Chicago

O'Leary, Timothy J. Computing Essentials: Annual Edition 1991-1992. New York: McGraw-Hill, 1991.

Dyfyniad MLA

O'Leary, Timothy J. Computing Essentials: Annual Edition 1991-1992. McGraw-Hill, 1991.

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