Chang, H.C.
Edinburgh University Press, 1973
Buku Teks SO
Ibnu Wahyudi
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 1994
UI - Laporan Penelitian
Blamires, Harry
Routledge, 1994
Buku Teks SO
edited by Ian Qusby
Cambridge University Press, 1988
Buku Referensi
edited by Margaret Drabble
Oxford University Press, 1985
Buku Referensi