Peter F.drucker. (1999). Management challenges for the 21st century. Replica press.
Chicago Edition CitationPeter F.drucker. Management Challenges for the 21st Century. Del;hi: Replica press, 1999.
MLA Edition CitationPeter F.drucker. Management Challenges for the 21st Century. Replica press, 1999.
Warning: These citations may not always be 100% accurate.