Não informado. Research in Public Health Administration. Johns Hopkins University, School of Hygiene and Public Health.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Research in Public Health Administration. Baltimore, Md: Johns Hopkins University, School of Hygiene and Public Health.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Research in Public Health Administration. Johns Hopkins University, School of Hygiene and Public Health.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.