Shapiro, Alan C., author
Allyn and Bacon, 1992
Buku Teks
Faguet, Dmitri, author
John Wiley & Sons, 2003
Buku Teks
Richard D. Irwin, inc., 1990
Buku Teks
by David F. Scott ... [and others]
Prentice Hall International, 1999
Buku Teks
Brigham, Eugene F., 1930-, author
Dryden Press, 1985
Buku Teks