Zahn, Markus
Krieger, 1987
Buku Teks
Zahn, Markus
John Wiley & Sons, 1979
Buku Teks
Shurtleff, Robert G., author
Prentice-Hall, 1992
Buku Teks
Gross, Debra, author
Course Technology/Cengage Learning, 2011
Buku Teks
Johnson, Louise C., 1923-, author
Allyn and Bacon, 1986
Buku Teks