Cita APA (7th ed.)

Drucker, P. F. (1980). Managing in turbulent times. Harper & Row; Butterworth-Heinemann.

Cita Chicago (17th ed.)

Drucker, Peter F. Managing in Turbulent Times. New York ; Oxford: Harper & Row; Butterworth-Heinemann, 1980.

Cita MLA (8th ed.)

Drucker, Peter F. Managing in Turbulent Times. Harper & Row; Butterworth-Heinemann, 1980.