Bredow, Miriam
McGraw-Hill, 1964
Buku Teks
Siregar, Dita Irmayani, author
2014
UI - Skripsi (Membership)
Hill, Austin Bradford, author
Pustaka Bumi Asih, 1982
Buku Teks
edited by Robert Kohn and Kerr L. White
Oxford University Press, 1976
Buku Teks
Rahmi Fauzia Putri, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2012
UI - Skripsi (Open)