Παραπομπή APA

Hoel, P. G., & Port, S. C. S. (1991). Introduction to probability theory. Universal.

Παραπομπή Chicago Style

Hoel, Paul G., και Sidney C Stone Port. Introduction to Probability Theory. New Delhi: Universal, 1991.

Παραπομπή MLA

Hoel, Paul G., και Sidney C Stone Port. Introduction to Probability Theory. Universal, 1991.