Cita APA (7th ed.)

Drucker, P. F. (1989). The New Realities. Harper $ Row.

Cita Chicago (17th ed.)

Drucker, Peter F. The New Realities. New York: Harper $ Row, 1989.

Cita MLA (9th ed.)

Drucker, Peter F. The New Realities. Harper $ Row, 1989.