Prentice-Hall, 1990
Buku Teks
Stahl, O. Glenn
Harper ,
Buku Teks
Sylvia, Ronald D.
Harcourt College Publisher, 2002
Buku Teks SO
Sylvia, Ronald D.
Harcourt College Publisher, 2002
Buku Teks
Cayer, N. Joseph
Wadsworth/Thomson Learning, 2004
Buku Teks SO