Cita APA (7th ed.)

Drucker, P. F., Hesselbein, F., & Economy, P. (2015). Peter Drucker's five most important questions: Enduring wisdom for young leaders. John Wiley & Sons.

Cita Chicago (17th ed.)

Drucker, Peter F., Frances Hesselbein, i Peter Economy. Peter Drucker's Five Most Important Questions: Enduring Wisdom for Young Leaders. Hoboken, New Jersey: John Wiley & Sons, 2015.

Cita MLA (9th ed.)

Drucker, Peter F., et al. Peter Drucker's Five Most Important Questions: Enduring Wisdom for Young Leaders. John Wiley & Sons, 2015.