Cita APA (7th ed.)
Klemens, B. (2015). 21st century C (2nd ed.). O'Reilly Media, Inc..
Cita Chicago (17th ed.)
Klemens, Ben. 21st Century C. 2nd ed. Beijing: O'Reilly Media, Inc., 2015.
Cita MLA (9th ed.)
Klemens, Ben. 21st Century C. 2nd ed. O'Reilly Media, Inc., 2015.
Atenció: Aquestes cites poden no estar 100% correctes.