Savage, William R.
Oxford University Press, 1977
Buku Teks
Martin, William J., author
Brookfield, Vt., USA : Gower,, 1995.
Buku Teks
Martin, William J., author
Aslib Gower, 1995
Buku Teks
Friedman, Avner, author
Society for Industrial and Applied Mathematics, 1994
eBooks
Mayo, Elton, author
Routledge, 1949
Buku Teks