Lee, Ji-Hyo, author
Bukphoseu, 2010
Buku Teks
Halperin, Haim
Frederick A. Praeger, 1963
Buku Teks
Sen, Sudhir
Tata McGRaw-Hill, 1975
Buku Teks
Hirschman, Albert O.
New York, N.Y. University Press, 1958
Buku Teks
Nemchinov, V. S
Oliver & Boyd 1964, 1964
Buku Teks