Dyfyniad APA

Drucker, P. F. (1992). Managing for the future: The 1990s and beyond. Dutton.

Dyfyniad Arddull Chicago

Drucker, Peter Ferdinand. Managing for the Future: The 1990s and Beyond. New York: Dutton, 1992.

Dyfyniad MLA

Drucker, Peter Ferdinand. Managing for the Future: The 1990s and Beyond. Dutton, 1992.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.