((Editors of Encyclopædia Britannica)). The New Encyclopædia Britannica. Encyclopædia Britannica, 1998, p. 731. ISBN 978-0-85229-633-2., Quote:"Kapila (fl. 550 BC), Vedic sage and founder of the system of Samkhya, one of the six schools of Vedic philosophy."
((Editors of Encyclopædia Britannica)). The New Encyclopædia Britannica. Encyclopædia Britannica, 1998, p. 731. ISBN 978-0-85229-633-2., Quote:"Kapila (fl. 550 BC), Vedic sage and founder of the system of Samkhya, one of the six schools of Vedic philosophy."