Não informado. (1918). Commonwealth. Department of Public Health.
Chicago-Zitierstil (17. Ausg.)Não informado. Commonwealth. Boston, Mass: Department of Public Health, 1918.
MLA-Zitierstil (8. Ausg.)Não informado. Commonwealth. Department of Public Health, 1918.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.