Dyfyniad APA

Drucker, P. F. (2011). The essential Drucker: Selections from the management works of Peter F. Drucker (1st Collins Business Essentials pbk. ed.). Routledge.

Dyfyniad Arddull Chicago

Drucker, Peter F. The Essential Drucker: Selections from the Management Works of Peter F. Drucker. 1st Collins Business Essentials pbk. ed. London: Routledge, 2011.

Dyfyniad MLA

Drucker, Peter F. The Essential Drucker: Selections from the Management Works of Peter F. Drucker. 1st Collins Business Essentials pbk. ed. Routledge, 2011.

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