Cita APA (7a ed.)

MacMahon, B., & Pugh, T. F. (1970). Epidemiology: Principles and methods. Little, Brown.

Cita Chicago Style (17a ed.)

MacMahon, Brian, y Thomas F. Pugh. Epidemiology: Principles and Methods. Boston: Little, Brown, 1970.

Cita MLA (9a ed.)

MacMahon, Brian, y Thomas F. Pugh. Epidemiology: Principles and Methods. Little, Brown, 1970.