Dobb, Maurice, author
International Publishers, 1947
Buku Teks
Kang, David C., author
Cambridge, 2002
Buku Teks
Cammack, Paul Anthony, author
Leicester University Press, 1997
Buku Teks
Molander, Earl A.
McGraw-Hill, 1980
Buku Teks
Lee, Keun
M.E. Sharpe, 1993
Buku Teks