Taussig, F. W.
Macmillan, 1947
Buku Teks
Lovering, W.F.
Longmans, 1966
Buku Teks
Burgess, W. Randolph
Harper & Brothers , 1946
Buku Teks
Waal, W.F. de
E. Fuhri & Co., [Date of publication not identified]
Buku Teks
Thomas, F. W.
University of Calcuta, 1942
Buku Teks