Dyfyniad APA

Drucker, P. F. (1993). Managing for the future: The 1990s and beyond. McGraw -Hill.

Dyfyniad Arddull Chicago

Drucker, Peter F. Managing for the Future: The 1990s and Beyond. New Delhi: McGraw -Hill, 1993.

Dyfyniad MLA

Drucker, Peter F. Managing for the Future: The 1990s and Beyond. McGraw -Hill, 1993.

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