Gaya APA

Kirk, G, &, R, J. (1971). The presocratic philosophers: A critical history with a se- lection of texts. . Cambridge: Cambridge Cambridge University Press.

Gaya MLA

Kirk, G.S., &, Raven,, J.E.. "The presocratic philosophers: A critical history with a se- lection of texts. ". Cambridge: Cambridge Cambridge University Press, 1971. Buku.