Kaushik, Devendra
Sterling Publishers, , 1975
Buku Teks
Pinkney, Robert, author
Open University Press, 1993
Buku Teks
Handelman, Howard, author
Pearson/Prentice Hall, 2006
Buku Teks
Kanshik, Devendra
Sterling Publisher PVT LTD, 1975
Buku Teks
Cammack, Paul Anthony, author
Macmillan, 1993
Buku Teks