Dyfyniad APA

DRUCKER PETER F. (2000). EFFECTIVE EXECUTIVE. BUTTERWORTH-HEINEMANN.

Dyfyniad Arddull Chicago

DRUCKER PETER F. EFFECTIVE EXECUTIVE. OXFORD: BUTTERWORTH-HEINEMANN, 2000.

Dyfyniad MLA

DRUCKER PETER F. EFFECTIVE EXECUTIVE. BUTTERWORTH-HEINEMANN, 2000.

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