Ibrahim, M. A. (1985). Epidemiology and health policy. An Aspen.
Chicago Style aipamenaIbrahim, Michel A. Epidemiology and Health Policy. United States: An Aspen, 1985.
MLA aipamenaIbrahim, Michel A. Epidemiology and Health Policy. An Aspen, 1985.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.