APA Edition Citation

Hoel, P. G., Port, S. C., & Stone, C. J. (1971). Introduction to probability theory.

Chicago Edition Citation

Hoel, Paul G., Sidney C. Port, and Charles J. Stone. Introduction to Probability Theory. Atlanta, Houghton Mufflin Company, 1971.

MLA Edition Citation

Hoel, Paul G., et al. Introduction to Probability Theory. 1971.