Laster, James D
Scott, Foresman and Company, 1984
Buku Teks SO
Lester, James D.
Scott, Foresman and Company, 1987
Buku Teks SO
Lester, James D.
Scott, Foresman and Company, 1971
Buku Teks SO
Mahmoud, Shah
Betterway, 1992
Buku Referensi
Lester, James D. Sr., 1935-2006
Pearson, 2015
Buku Teks