Young, Felina C., author
IPWI, 1999
Buku Teks
Mahmoud, Shah, author
Betterway, 1992
Buku Referensi
Atwan, Robert, author
McGraw-Hill, 1987
Buku Teks
Lester, James D.
Scott, Foresman and Company, 1967
Koleksi Publik
Lester, James D.
Scott, Foresman and Company, 1987
Buku Teks