White, Edith
McFarlan, 1991
Buku Teks
Nick G. Dharmaputra
Center for health research University of Indonesia, 1997
Buku Teks
Carole A. Campbell
Cambridge University Press, 1999
eBooks
Goss, David
Routledge, 1991
Buku Teks
West, E.G.
Airlington House, 1969
Buku Teks