Frank, Marcella, author
Prentice-Hall, 1972
Buku Teks
Oxborrow, Mike
McGraw-Hill, 1993
Buku Referensi
Artikel Jurnal
Nur Indah Kusuma Dewi, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
UI - Tesis (Membership)
editor, Robert H. Perry
McGraw-Hill, 1976
Buku Referensi