Dyfyniad APA

PORTER MICHAEL E. (1985). COMPETITIVE ADVANTAGE: CREATING AND SUSTAINING SUPERIOR... FREE PRESS.

Dyfyniad Arddull Chicago

PORTER MICHAEL E. COMPETITIVE ADVANTAGE: CREATING AND SUSTAINING SUPERIOR... NEW YORK: FREE PRESS, 1985.

Dyfyniad MLA

PORTER MICHAEL E. COMPETITIVE ADVANTAGE: CREATING AND SUSTAINING SUPERIOR... FREE PRESS, 1985.

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