Walters, Jack Edward
Littlefield, Adams, 1959
Buku Teks
Le Brefon, Preston P.
Holt, Rinehart and Winston, 1965
Buku Teks
Kilgannon, Pete, author
McGraw-Hill, 1980
Buku Teks
Urwick, Lyndall F., author
Harper & Brothers, 1960
Buku Teks
Bryson, John A., author
American Institute of Banking, 1959
Buku Teks