Diekelmann, John
University of Wisconsin Press, 1982
Buku Teks
Jacobs, William P.
Cambridge University Press , 1979
Buku Teks
Weaver, John E.
McGraw-Hill, 1938
Buku Teks
Mohr, Hans, 1930-
Springer-Verlag, 1995
Buku Teks
Bold, Harold Charles, 1909-
Prentice-Hall, 1987
Buku Teks