APA (7th ed.) Citation

Drucker, P. F. (1982). The changing world of the executive. Times Books.

Chicago Style (17th ed.) Citation

Drucker, Peter Ferdinand. The Changing World of the Executive. New York, N.Y: Times Books, 1982.

MLA (9th ed.) Citation

Drucker, Peter Ferdinand. The Changing World of the Executive. Times Books, 1982.

Warning: These citations may not always be 100% accurate.