Dyfyniad APA

Magretta, J. (2012). Understanding Michael Porter. Harvard Business School.

Dyfyniad Arddull Chicago

Magretta, Joan. Understanding Michael Porter. Boston: Harvard Business School, 2012.

Dyfyniad MLA

Magretta, Joan. Understanding Michael Porter. Harvard Business School, 2012.

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