Dyfyniad APA

Drucker, P. F. (2008). Classic drucker: Essential wisdom of Peter Drucker from the pages of Harvard Business Review. Harvaed Business.

Dyfyniad Arddull Chicago

Drucker, Peter F. Classic Drucker: Essential Wisdom of Peter Drucker from the Pages of Harvard Business Review. Boston: Harvaed Business, 2008.

Dyfyniad MLA

Drucker, Peter F. Classic Drucker: Essential Wisdom of Peter Drucker from the Pages of Harvard Business Review. Harvaed Business, 2008.

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