APA (7th ed.) Citation

University of Pennsylvania. Press, publisher, & Institute of Mathematical Statistics. (2015). Observational studies. Dylan Small.

Chicago Style (17th ed.) Citation

University of Pennsylvania. Press, publisher, and Institute of Mathematical Statistics. Observational Studies. [Place of publication not identified]: Dylan Small, 2015.

MLA (9th ed.) Citation

University of Pennsylvania. Press, publisher, and Institute of Mathematical Statistics. Observational Studies. Dylan Small, 2015.