APA (7th ed.) Citation

Gibson, J. (2012). Lesson 7: Mathematical expectation. Math Tutor DVD.

Chicago Style (17th ed.) Citation

Gibson, Jason. Lesson 7: Mathematical Expectation. [Place of publication not identified]: Math Tutor DVD, 2012.

MLA (9th ed.) Citation

Gibson, Jason. Lesson 7: Mathematical Expectation. Math Tutor DVD, 2012.