Não informado. (1906). Public Health. Department of Health.
Chicago-Zitierstil (17. Ausg.)Não informado. Public Health. Lansing, Mich: Department of Health, 1906.
MLA-Zitierstil (8. Ausg.)Não informado. Public Health. Department of Health, 1906.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.