Untermeyer, Louis
Simon & Schuster, 1955
Buku Teks
Shaw, Harry
McGraw-Hill, 1975
Buku Referensi
Flavell, Roger
Kyle Cathie, 1995
Buku Referensi
Dando, Sylvia
McGraw-Hill Book, 1987
Buku Referensi
Shipley, Joseph T.
Philosophical Library, 1945
Buku Referensi