Homan, Paul T.
Harcourt, Brace and Company, 1958
Buku Teks
Strachey, Lytton, author
London William Collins and Sons 1959
Buku Teks
Kaufman, Arnold
McGraw-Hills, 1998
Buku Teks
Chard, Chester S.
McGraw-Hill, 1975
Buku Teks
Eagle, Chester
McPhee Gribble/Penguins Books, 1985
Buku Teks