APA (7th ed.) Citation

Heller, R. (2000). Peter Drucker (NA.). Dorling Kindersley.

Chicago Style (17th ed.) Citation

Heller, Robert. Peter Drucker. NA. London: Dorling Kindersley, 2000.

MLA (9th ed.) Citation

Heller, Robert. Peter Drucker. NA. Dorling Kindersley, 2000.