Weylman, C. R. (2019). The power of why (1st.). Jaico Publishing, Mumbai.
Čikaški stil citiranja (17. izdanje)Weylman, C. Richard. The Power of Why. 1st. Jaico Publishing, Mumbai, 2019.
MLA način citiranja (9. izdanje)Weylman, C. Richard. The Power of Why. 1st. Jaico Publishing, Mumbai, 2019.
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