Mosbaek, Ernest
North-Holland Publishing Company , 1970
Buku Teks
Larsen, Richard J.
Prentice-Hall, 1981
Buku Teks
Dudewicz, Edward J., author
ITB Press, 1995
Buku Teks
Larsen, Richard J.
Prentice-Hall, 1996
Buku Teks
Chernoff, Herman
John Wiley & Sons, 1959
Buku Teks