Zahn, Markus
John Wiley & Sons, 1979
Buku Teks
Zahn, Markus
Krieger, 1987
Buku Teks
Siegel, Daniel M.
Cambridge University Press, 1991
Buku Teks
Paul, Clayton R., author
McGraw-Hill, 1982
Buku Teks
Eyges, Leonard, author
Dover Publication. Inc, 2015
Buku Teks