Population Reports: Population Information Program. The John Hopkims Universtity School of Hygiene and Public Health. Population Information Program.
Cita Chicago Style (17a ed.)Population Reports: Population Information Program. The John Hopkims Universtity School of Hygiene and Public Health. Maryland, Estados Unidos: Population Information Program.
Cita MLA (9a ed.)Population Reports: Population Information Program. The John Hopkims Universtity School of Hygiene and Public Health. Population Information Program.
警告：这些引文格式不一定是100％准确.