edited by Marcia G. Ory, Alfred P. Duncker
Sage , 1992
Buku Teks
Newell, Kenneth W.
World Health Organization, 1975
Buku Teks
Reese, Charles D.
CRC Press, 2009
Buku Referensi
Yassi, Annalee
Oxford University Press, 2001
Buku Teks
Kuzma, Jan W.
Mayfield Publ., 1984
Buku Teks