Citazione Stile APA (7a Edizione)

Solomon, R. C., & Higgins, K. M. (2014). The big questions : a short introduction to philosophy: A short introduction to philosophy (9th ed.). Wadsworth, Cengage Learning.

Citazione stile Chigago Style (17a edizione)

Solomon, Robert C., e Kathleen M. Higgins. The Big Questions : A Short Introduction to Philosophy: A Short Introduction to Philosophy. 9th ed. Belmont, CA: Wadsworth, Cengage Learning, 2014.

Citatione MLA (9a ed.)

Solomon, Robert C., e Kathleen M. Higgins. The Big Questions : A Short Introduction to Philosophy: A Short Introduction to Philosophy. 9th ed. Wadsworth, Cengage Learning, 2014.