Corwin, Edward S., author
William Sloane, 1949
Buku Teks
Jennings, Ivor, Sir, 1903-1965, author
Hodder and Stoughton, 1979
Buku Teks
Corwin, Edward S., author
Holt, Rinehart and Winston, 1964
Buku Teks
Scaros, Constantinos E., author
Jones and Bartlett Publishers, 2011
Buku Teks
Lewis, William Draper, author
Michie, 1937
Buku Teks