Duffus, Robert Luther
Norton, 1963
Buku Teks
Hodgson, Godfrey
Vintage Books, 1976
Buku Teks
Boorstin, Daniel J., author
Random House, 1971
Buku Teks
Barrett, William E., author
Popular Library, 1962
Koleksi Publik
edited by Hal Porter
Rigby, 1972
Buku Teks