Lewis, Charlton T., author
New York American Book 1918
Buku Referensi
Marchant, James Robert Vernam, 1853-1936, editor
New York Funk & Wagnalls [t.th.]
Buku Teks
Janos, author
Budapest Franklin 1902
Buku Referensi
revised by J.R.V. Marchant and Joseph F. Charles
Cassell, 1952
Buku Referensi
Follet Publishing , 1961
Buku Referensi