Παραπομπή σε μορφή APA (7η εκδ.)

Johnson, O. A. (2022). Skepticism and Cognitivism: A Study in the Foundations of Knowledge. University of California Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Johnson, Oliver A. Skepticism and Cognitivism: A Study in the Foundations of Knowledge. Berkeley: University of California Press, 2022.

Παραπομπή σε μορφή MLA (9th εκδ.)

Johnson, Oliver A. Skepticism and Cognitivism: A Study in the Foundations of Knowledge. University of California Press, 2022.