Vaish, M.C.
Oxford & IBH Pub. Co., 1988
Buku Teks
Singh, Nagendra Kumar
Stevens and Sons, 1983
Buku Teks
Singh, Sadhu
Khanna, 1979
Buku Teks
Singh, Madanjeet
New York Graphic Society, 1956
Buku Referensi
Singh, Lalita Prasad
Humanities Press, 1979
Buku Teks