Editors of Encyclopædia Britannica. (1998) The New Encyclopædia Britannica. Encyclopædia Britannica. ISBN 978-0-85229-633-2.
, Citaĵo:"Kapila (fl. 550 BC), Vedic sage and founder of the system of Samkhya, one of the six schools of Vedic philosophy."
Guida Myrl Jackson-Laufer (1994). Traditional Epics: A Literary Companion. Oxford University Press. p. 321. ISBN 978-0-19-510276-5. Arkivita el la originalo la 23an de decembro 2016. Alirita la 11an de oktobro 2016., citaĵo: "Kapila was a Vedic sage (ca. 550 B.C.) and founder of the Samkhya school of Vedic philosophy.";
John Haldane; Krishna Dronamraju (2009). What I Require From Life. Oxford University Press. p. 225. ISBN 978-0-19-923770-8. Arkivita el la originalo la 16an de aprilo 2017. Alirita la 11an de oktobro 2016.