Compiled and edited by Dorothy Nyren Curley, Maurice Kramer, Elaine Fialka Kramer
Continuum, 1989
Buku Referensi
Scott, Foresman And Co, 1954
Buku Teks
Watt, Homer A., author
Scott, Foresman, 1932
Buku Teks
Watt, Homer A., author
Scott, Foresman, 1932
Buku Teks
Abel, Darrel, author
Barron's Educational Series, 1963
Buku Referensi