Service, Elman R. (Elman Rogers), 1915-1996, author
Random House, 1971
Buku Teks
Claessen, Henri J. M., author
Erlangga , 1987
Buku Teks
Routledge , 1997
Buku Teks
Hall, J.C.
London Longmans 1956
Buku Teks
P.M. Laksono, author
Gadjah Mada University Press, 1985
Buku Teks