Edwards, James Don, author
Richard D. Irwin, 1989
Buku Teks
by Belverd E. Needles ... [and others]
Houghton Miffiln, 1999
Buku Teks
Slavin, Albert, author
Holt Rinehart and Winston, 1972
Buku Teks
Warren, Carl S., author
International Thomson, 1999
Buku Teks
Reeve, James M., 1953-, author
South Western Cengage Learning, 2012
Buku Teks