Παραπομπή σε μορφή APA (7η εκδ.)

Humphreys, P. (1989). The chances of explanation: Causal explanation n the social, medical, and physical science. Princeton University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Humphreys, Paul. The Chances of Explanation: Causal Explanation N the Social, Medical, and Physical Science. Princeton: Princeton University Press, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Humphreys, Paul. The Chances of Explanation: Causal Explanation N the Social, Medical, and Physical Science. Princeton University Press, 1989.