Dyfyniad APA

(1981). 1981 U.S. industrial outlook for 200 industries with projections for 1985. Washington.

Dyfyniad Arddull Chicago

1981 U.S. Industrial Outlook for 200 Industries With Projections for 1985. Washington, 1981.

Dyfyniad MLA

1981 U.S. Industrial Outlook for 200 Industries With Projections for 1985. Washington, 1981.

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