APA-viite (7. p.)

Trompenaars, A., & Hampden-Turner, C. (2002). 21 leaders for the 21st century: How innovative leaders manage in the digital age. McGraw-Hill, Tata McGraw-Hill.

Chicago-viite (17. p.)

Trompenaars, Alfons, ja Charles Hampden-Turner. 21 Leaders for the 21st Century: How Innovative Leaders Manage in the Digital Age. New York ; New Delhi: McGraw-Hill, Tata McGraw-Hill, 2002.

MLA-viite (8. p.)

Trompenaars, Alfons, ja Charles Hampden-Turner. 21 Leaders for the 21st Century: How Innovative Leaders Manage in the Digital Age. McGraw-Hill, Tata McGraw-Hill, 2002.