Mcinnes, Graham
Toronto The Macmillan Co of Canada Limited 1950
Buku Teks
Kusnadi
Dinas Kebudayaan DKI Jakarta, 1994
Buku Referensi
Cothey, A.L.
Routledge, 1990
Buku Teks SO
edited by John Gassner and Sidney Thomas
Crown, 1964
Buku Teks SO
Burnett, David
Hurtig, 1983
Buku Teks SO