Brown, David
Macmillan, 1978
Buku Teks SO
edited by Helen Hughes and You Poh Seng
University of Wisconsin Press, 1969
Buku Teks
Gedam, Ratnakar M
Deep & Deep Publications, 1987
Buku Teks SO
Mandelbaun, K.
Kelly Millman, Inc. , 1955
Buku Teks
[publisher not identified], [date of publication not identified]
Buku Teks