Meyers, Alan, 1945-
Pearson Education, 2014
Buku Teks
Mahmoud, Shah
Betterway, 1992
Buku Referensi
Lester, James D.
Scott, Foresman and Company, 1987
Buku Teks
Lester, James D.
Scott, Foresman and Company, 1971
Buku Teks
Laster, James D
Scott, Foresman and Company, 1984
Buku Teks