Population Reports: Population Information Program. The John Hopkims Universtity School of Hygiene and Public Health. Population Information Program.
Citazione stile Chigago Style (17a edizione)Population Reports: Population Information Program. The John Hopkims Universtity School of Hygiene and Public Health. Maryland, Estados Unidos: Population Information Program.
Citatione MLA (9a ed.)Population Reports: Population Information Program. The John Hopkims Universtity School of Hygiene and Public Health. Population Information Program.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.