APA (7th ed.) Citation

Drucker, P. F. (1985). Innovation and entrepreneurship: Practice and principles. Harper Business.

Chicago Style (17th ed.) Citation

Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. New York: Harper Business, 1985.

MLA (9th ed.) Citation

Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. Harper Business, 1985.

Warning: These citations may not always be 100% accurate.