Vogt, William
William Sloane Associates, Inc., 1948
Buku Klasik
Baruch, Bernard M.
Sinmon and Schuster, INC, 1954
Buku Teks
Hoffman, William M.
Vintage Books , 1985
Buku Teks
McGraw-Hill Book Comp., 1971
Buku Teks
Shakespeare, William, 1564-1616
Dell, 1959
Buku Teks