Farrell, Edmund James ... [et al.]
Scott, Foresman, 1976
Buku Teks
Slager, Williams
McGraw-Hill,
Buku Teks
Palmer, Barbara C., author
Allyn and Bacon, 1994
Buku Teks
Bielby, Nicholas
Scholastic Publications, 1994
Buku Teks
Heinemann Educational Books, 1981
Buku Teks