Hall, John W., author
Yale University Press, 1974
Buku Teks
Lyon, Bryce, author
Harper and Brothers, 1960
Buku Teks
Otis, William Bradley, author
Barnes & Noble, 1939
Koleksi Publik
Needleman, Morris H., author
Barnes & Noble, 1939
Koleksi Publik
Sellman, Roger Raymond, author
Edward Arnold, 1954
Buku Referensi