Poppel, H. (1987). Information technology: The Trillion- dollar opportunity. New York: McGraw- Hill Book Company.
Dyfyniad Arddull ChicagoPoppel, Harvey. Information Technology: The Trillion- Dollar Opportunity. New York: McGraw- Hill Book Company, 1987.
Dyfyniad MLAPoppel, Harvey. Information Technology: The Trillion- Dollar Opportunity. New York: McGraw- Hill Book Company, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.