Garvy, George
Federal Reserve Bank of New York, 1966
Buku Teks
Stromberg, Roland N.
Prentice-Hall, 1997
Buku Teks
Stromberg, Roland N.
Prentice-Hall, 1990
Buku Teks
Cambridge University Press, 2018
eBooks
Aczel, Tamas
Frederick A. Praeger, 1959
Buku Teks