Dyfyniad APA

PORTER MICHAEL E. (1983). CASES IN COMPETITIVE STRATEGY. FREE PRESS.

Dyfyniad Arddull Chicago

PORTER MICHAEL E. CASES IN COMPETITIVE STRATEGY. NEW YORK LONDON: FREE PRESS, 1983.

Dyfyniad MLA

PORTER MICHAEL E. CASES IN COMPETITIVE STRATEGY. FREE PRESS, 1983.

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