APA (7th ed.) Citation

Drucker, P. F. (1985). Managing in turbulent times. Harper Colophon Books, Harper & Row.

Chicago Style (17th ed.) Citation

Drucker, Peter F. Managing in Turbulent Times. New York [u.a.]: Harper Colophon Books, Harper & Row, 1985.

MLA (9th ed.) Citation

Drucker, Peter F. Managing in Turbulent Times. Harper Colophon Books, Harper & Row, 1985.