Clewer, Ann, author
Pearson Education, 1998
Buku Teks
Folland, Sherman, author
Prentice-Hall, 1997
Buku Teks
Folland, Sherman, author
Prentice-Hall, 2001
Buku Teks
Mooney, Gavin H., author
Pearson Education, 2003
Buku Teks
Feldstein, Paul J., author
Delmar, 1999
Buku Teks