1. https://www.antiktarih.com/2018/05/04/herakles-herkul-ve-on-iki-gorevi/
2. https://tr.wikipedia.org/wiki/Hidra_(efsanevi_yarat%C4%B1k)#:~:text=Hidra%2C%20Yunan%20mitolojisinde%20anlat%C4%B1lan%20%C3%A7ok%20ba%C5%9Fl%C4%B1%20bir%20yarat%C4%B1k.&text=Argolis%20antik%20%C5%9Fehrinde%2C%20Lerna%20batakl%C4%B1klar%C4%B1nda,2.%20s%C4.
3. https://acikders.ankara.edu.tr/pluginfile.php/203554/mod_resource/content/1/HERAKLES.pdf
4. https://tr.wikipedia.org/wiki/Hidra_(efsanevi_yarat%C4%B1k)#:~:text=Hidra%2C%20Yunan%20mitolojisinde%20anlat%C4%B1lan%20%C3%A7ok%20ba%C5%9Fl%C4%B1%20bir%20yarat%C4%B1k.&text=Argolis%20antik%20%C5%9Fehrinde%2C%20Lerna%20batakl%C4%B1klar%C4%B1nda,2.%20s%C4.
5. https://tr.wikipedia.org/wiki/Hidra_(efsanevi_yarat%C4%B1k)#:~:text=Hidra%2C%20Yunan%20mitolojisinde%20anlat%C4%B1lan%20%C3%A7ok%20ba%C5%9Fl%C4%B1%20bir%20yarat%C4%B1k.&text=Argolis%20antik%20%C5%9Fehrinde%2C%20Lerna%20batakl%C4%B1klar%C4%B1nda,2.%20s%C4.