Dyfyniad APA

(1993). World directory of business information libraries. Euromonitor PLC.

Dyfyniad Arddull Chicago

World Directory of Business Information Libraries. London: Euromonitor PLC, 1993.

Dyfyniad MLA

World Directory of Business Information Libraries. Euromonitor PLC, 1993.

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