The Dushkin publishing group, 1989
Buku Teks
The Dushkin publishing group, 1988
Buku Teks
Chandra, Prakash, author
Vikas Publishing House, 1982
Buku Teks
Chandra, Prakash, author
Vikas Publishing House, 1982
Buku Teks
Ray, James Lee, author
Houghton Mifflin, 1987
Buku Teks