Franklin, Bob, author
Routledge , 1991
Buku Teks
Garvy, George
Federal Reserve Bank of New York, 1966
Buku Teks
Gsovski, Vladimir
Atlantic Books, 1959
Buku Teks
Kevin M McDermott; Matthew Stibbe
Berg, 2006
Buku Teks
Lewis, Paul G., author
Routledge, 2000
Buku Teks