Reeves, Ruth E.
Ginn, 1978
Buku Teks
Blair, Walter, author
Scott, Foresman and Company, 1948
Buku Teks
Oceana`s Docket Books, 1964
Buku Teks
Jones, Edward Harrell, 1922-, author
Macmillan, 1968
Buku Teks
Kearns, Francis E.
Holt, Rinehart and Winston, 1970
Buku Teks