APA-viite (7. p.)
Drucker, P. F., Hesselbein, F., & Economy, P. (2015). Peter Drucker's five most important questions: Enduring wisdom for young leaders. John Wiley & Sons.
Chicago-viite (17. p.)
Drucker, Peter F., Frances Hesselbein, ja Peter Economy. Peter Drucker's Five Most Important Questions: Enduring Wisdom for Young Leaders. Hoboken, New Jersey: John Wiley & Sons, 2015.
MLA-viite (9. p.)
Drucker, Peter F., et al. Peter Drucker's Five Most Important Questions: Enduring Wisdom for Young Leaders. John Wiley & Sons, 2015.
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