APA Style

Papoulis, A., Pillai, U. (2002). Probability, random variables, and stochastic processes. Fourth Edition (Fourth Edition). Boston: McGraw-Hill.

MLA Style

Papoulis, Athanasios., Pillai, Unnikrishna. "Probability, random variables, and stochastic processes. Fourth Edition". Fourth Edition Boston: McGraw-Hill, 2002. Text.