Flaherty, J. E. (2002). Peter Drucker: Shaping the Managerial Mind. Jossey-Bass.
Dyfyniad Arddull ChicagoFlaherty, John E. Peter Drucker: Shaping the Managerial Mind. San Francisco, Calif: Jossey-Bass, 2002.
Dyfyniad MLAFlaherty, John E. Peter Drucker: Shaping the Managerial Mind. Jossey-Bass, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.