Smith, Bonnie G., author
D.C. Heath, 1989
Buku Teks
Becker, Carl L. (Carl Lotus), 1873-1945, author
Silver Burdett, 1944
Buku Teks
Freymond, Jacques, author
Frederick A. Preager, 1964
Buku Teks
edited by V.A.C. Gatrell, Bruce Lenman, and Geoffrey Parker
Europa Publications, 1980
Buku Referensi
Laqueuer, Walter
Penguin Books, 1972
Buku Teks