Não informado. (1973). Bulletin of the Pan American Health Organization. Pan American Health Organization.
Chicago-Zitierstil (17. Ausg.)Não informado. Bulletin of the Pan American Health Organization. Washington: Pan American Health Organization, 1973.
MLA-Zitierstil (8. Ausg.)Não informado. Bulletin of the Pan American Health Organization. Pan American Health Organization, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.