Foster, Douglas
Longman, 1972
Buku Teks
Brown, Harriete J
Harper & Brothers Published, 1952
Buku Teks
Wolf, Thomas, author
A fireside Book, 1990
Buku Teks
Kambey, Jopie H.A., author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 1992
UI - Tesis (Membership)
Mulligan, James G., author
Allyn and Bacon, 1989
Buku Teks