edited by Rondo Cameron
Oxford University Press, 1972
Buku Teks
Taussig, Frank William, author
Harvard University Press, 1934
Buku Teks
Moore, Wilbert E. (Wilbert Ellis), author
Cornell University Press , 1951
Buku Teks
Echavarria, Jose Medina, author
New York, N.Y., Unesco
Buku Teks
Raj, K.N.
Asia Pub. House, 1960
Buku Teks