Pearman, William A. and Starr, Philip
New York : Garland Publishing, 1988,
Buku Referensi
Miller, Jerome S.
Prentice-Hall, 1953
Buku Teks
Astek , 1995
Buku Teks
Health Insurance Association, 2002
Buku Teks
Aisya Safira Nisa
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2022
UI - Skripsi Membership