Since its publication by Academic Press, tens of thousands of students have taken a probability course using this classic textbook. Chung's A Course in Probability Theory, now in its third edition, has sustained its popularity for nearly 35 years. Originally developed from Dr. Chung's course at Stanford University, this book continues to be a successful tool for instructors and students alike. This third edition offers for the first time a supplement on Measure and Integral. This material has been used to supplement Dr. Chung's course for many years. It will assist students not previously exposed to this material and can also be sued as a review. The text is very flexible, offering instructors several different options in creating their syllabus, or in aligning it with current course design. It has been used successfully at over 75 universities since its initial publication. --back cover