Basu, Saroj Kumar
University of Calcutta India Press , 1953
Buku Teks
Birdwood, George C.M.
Chapman and Hall, [Date of publication not identified]
Buku Teks SO
Rosen, George
Free of Glencoe, 1962
Buku Teks
Published by B. Blackwell for the United Nations Industrial Development Organization, 1990
Buku Teks
Rosen, George
Free Press, 1958
Buku Teks