Dyfyniad APA

Drucker, P. F. (1992). Managing For the Future: The 1990's and Beyond. McGraw-Hill.

Dyfyniad Arddull Chicago

Drucker, Peter F. Managing For the Future: The 1990's and Beyond. New Delhi: McGraw-Hill, 1992.

Dyfyniad MLA

Drucker, Peter F. Managing For the Future: The 1990's and Beyond. McGraw-Hill, 1992.

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