Dyfyniad APA

(1991). Medical career opportunities: The Pfizer Guide. New York: Published by Merritt Communications, Inc.

Dyfyniad Arddull Chicago

Medical Career Opportunities: The Pfizer Guide. New York: Published by Merritt Communications, Inc, 1991.

Dyfyniad MLA

Medical Career Opportunities: The Pfizer Guide. New York: Published by Merritt Communications, Inc, 1991.

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