APA aipamena

Drucker, P. F. (1980). Managing Turbulent Times. Harper & Row.

Chicago Style aipamena

Drucker, Peter F. Managing Turbulent Times. Harper & Row, 1980.

MLA aipamena

Drucker, Peter F. Managing Turbulent Times. Harper & Row, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.