Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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