Pennsylvania. State Board of Health and Vital Statistics. The Annals of hygiene. University of Pennsylvania Press [etc.].
Lua i Stíl Chicago (17ú heag.)Pennsylvania. State Board of Health and Vital Statistics. The Annals of Hygiene. Philadelphia: University of Pennsylvania Press [etc.].
Lua MLA (8ú heag.)Pennsylvania. State Board of Health and Vital Statistics. The Annals of Hygiene. University of Pennsylvania Press [etc.].
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.