Dyfyniad APA

Veryard, R. (1991). The Economics of Information Systems and Software. ELSEVIER.

Dyfyniad Arddull Chicago

Veryard, Richard. The Economics of Information Systems and Software. ELSEVIER, 1991.

Dyfyniad MLA

Veryard, Richard. The Economics of Information Systems and Software. ELSEVIER, 1991.

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