Sullivan, Jeremian M.
Jakarta : Biro Pusat Statistik, 1982,
Buku Referensi
Scidmore, Eliza Ruhamah
Oxford University Press, 1984
Buku Teks
Hugo, Graeme J.
Gadjah Mada Univ. Press, 1981
Buku Teks
Selo Soemardjan, author
Cornell University , 1963
Buku Teks
Ariswara
Intermedia, 1992
Buku Teks