APA aipamena

Drucker,Peter F. (1985). Innovation and entrepreneurship: Practice and principles. Heinemann.

Chicago Style aipamena

Drucker,Peter F. Innovation and Entrepreneurship: Practice and Principles. London: Heinemann, 1985.

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.