Cita APA (7a ed.)

Drucker, P. F. (1998). Managing in a time of great change. Butterworth-Heineman.

Cita Chicago Style (17a ed.)

Drucker, Peter F. Managing in a Time of Great Change. England.-: Butterworth-Heineman, 1998.

Cita MLA (9a ed.)

Drucker, Peter F. Managing in a Time of Great Change. Butterworth-Heineman, 1998.