APA-viite (7. p.)
Drucker, P. F. (2015). Innovation and entrepreneurship: Practice and principles (2nd ed.). Routledge.
Chicago-viite (17. p.)
Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. 2nd ed. New York: Routledge, 2015.
MLA-viite (9. p.)
Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. 2nd ed. Routledge, 2015.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.