Cita APA (7th ed.)

Duignan, B. (2010). Ancient philosophy: From 600 BCE to 500 CE. Britannica Educational Publishing.

Cita Chicago (17th ed.)

Duignan, Brian. Ancient Philosophy: From 600 BCE to 500 CE. New York: Britannica Educational Publishing, 2010.

Cita MLA (9th ed.)

Duignan, Brian. Ancient Philosophy: From 600 BCE to 500 CE. Britannica Educational Publishing, 2010.