APA استشهاد

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

استشهاد بنمط شيكاغو

Drucker, Peter F. Managing for the Future: The 1990s and Beyond. london: Routledge, 1992.

MLA استشهاد

Drucker, Peter F. Managing for the Future: The 1990s and Beyond. Routledge, 1992.