Williams, Basil, author
Oxford University, 1945
Buku Klasik
Bush, Lewis
Tokyo News Service, Ltd., 1960
Buku Teks
Lewis, M. M.
Social Sciences Publisher, 1948
Buku Teks
Hodous, Lewis
Arthur Probstain, 1929
Buku Teks
Hanke, Lewis
D. Van Nostrand Company, 1959
Buku Teks