Roughsey, Dick.
Reed, 1971
Buku Teks
Reynolds, Henry
Victoria Penguin Book, 1988
Buku Teks
Sorauf, Frank J.
Little, Brown & Co., 1988
Buku Teks
Kermode, Frank
Oliver and Boyd, 1960
Buku Teks
Sorauf, Frank J.
Glenview, Ill. Scott Foresman and Co, 1988.,
Buku Teks