Angel, Edward, author
Pearson, 2009
Buku Teks
Hearn, Donald, author
Prentice-Hall, 1996
Buku Teks
Hill, Francis S., author
Macmillan, 1990
Buku Teks
Hearn, Donald, author
Prentice-Hall, 1986
Buku Teks
by Donald Greenberg [and others]
Addison-Wesley, 1982
Buku Teks