Heller, R. (2000). Peter Drucker. Dorling Kindersley.
Chicago Style (17th ed.) CitationHeller, Robert. Peter Drucker. London: Dorling Kindersley, 2000.
MLA (9th ed.) CitationHeller, Robert. Peter Drucker. Dorling Kindersley, 2000.
Warning: These citations may not always be 100% accurate.