Bogen, Jules I.
Alexander Hamilton Institute, 1961
Buku Teks
Hamilton, Robert W.
St. Paul, Minn, 1989
Buku Teks
Husband, William H., author
Richard D. Irwin, 1948, 1955, 1962
Buku Teks
Masson, Robert L., author
McGraw-Hill, 1935
Buku Teks
Burtchett, Floyd Franklin
Clifford Milton, 1964
Buku Teks