edited by Jonathan Rigg
Archipelago Press, 1996
Buku Teks
Herber, Lewis
Alfred A. Knopf, 1962
Buku Teks
Boughey, Arthur S.
McMillan Publisher, 1975
Buku Teks
Getis, Arthur
Macmillan, 1985
Buku Teks
Meyer, Evelyn E.
World Health Organization, 1975
Buku Teks