APA stil citiranja

Trilling, B., & Fadel, C. (2009). 21st century skills: 21st century skills : learning for life in our times. San Francisco: Jossey-Bass.

Chicago stil citiranja

Trilling, Bernie, and Charles Fadel. 21st century skills: 21st century skills : learning for life in our times. San Francisco: Jossey-Bass, 2009.

MLA stil citiranja

Trilling, Bernie, and Charles Fadel. 21st century skills: 21st century skills : learning for life in our times. San Francisco: Jossey-Bass, 2009.