Sugars, Bradley J.
McGraw-Hill, 2006
Buku Teks
Universitas Indonesia, 1998
UI - Skripsi Membership
Kambey, Jopie H.A.
Fakultas Kesehatan Masyarakat Universitas Indonesia, 1992
UI - Tesis Membership
Foster, Douglas
Longman, 1972
Buku Teks
Welsch, Glenn A.
Prentice-Hall, 1970
Buku Teks