Weylman, C. R. (2019). The power of why (1st.). Jaico Publishing, Mumbai.
Cita Chicago (17th ed.)Weylman, C. Richard. The Power of Why. 1st. Jaico Publishing, Mumbai, 2019.
Cita MLA (9th ed.)Weylman, C. Richard. The Power of Why. 1st. Jaico Publishing, Mumbai, 2019.
Atenció: Aquestes cites poden no estar 100% correctes.