Winter, C.F.
Gadjah Mada University Press, 2007
Buku Teks SO
Komaruddin
Angkasa, 1982
Buku Referensi
Dedy Rusmadi
M2S Bandung, 1989
Buku Referensi
Sippl, Charles J.
Indomicros Surabaya, 1988
Buku Referensi
Lorens Bagus
Gramedia Pustaka Utama, [date of publication no identified]
Buku Referensi