Dyfyniad APA

Drucker, P. F. (1967). The effective executive. New York: Harper and Row.

Dyfyniad Arddull Chicago

Drucker, Peter F. The Effective Executive. New York: Harper and Row, 1967.

Dyfyniad MLA

Drucker, Peter F. The Effective Executive. New York: Harper and Row, 1967.

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