Gooch, G.P.
Beacon Press, 1968
Buku Teks
Yarwood, Doreen
I.R. Dee, 1991
Buku Teks
Black, C.E.
Alfred A. Knopf, 1961
Buku Teks
Black, C.E.
Alfred A. Knopf, 1966
Buku Teks
Harmein Harun
Fakultas Kesehatan Masyarakat Universitas Indonesia, 1988
UI - Tesis (Membership)