Mikesell, Raymond F.
The Twentieth Century Fund , 1954
Buku Teks
Chown, John F.
Quorum Books , 1990
Buku Teks
Einzig, Paul
Macmillans Co , 1970
Buku Teks
Einzig, Paul
Macmillan, 1973
Buku Teks
DeRosa, David F.
Probus Publishing Company , 1991
Buku Teks