Dyfyniad APA

Barney,Jay B. (1997). Gaining and sustaining competitive advantage. Addison Wesley.

Dyfyniad Arddull Chicago

Barney,Jay B. Gaining and Sustaining Competitive Advantage. U.S.A: Addison Wesley, 1997.

Dyfyniad MLA

Barney,Jay B. Gaining and Sustaining Competitive Advantage. Addison Wesley, 1997.

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