Chan, Yupo
South-Western College, 2001
Buku Teks
Fishburn, Peter C.
John Wiley & Sons, 1970
Buku Teks
Pratt, John W.
Massachusetts Institute of Technology, 1995
Buku Teks
Jones, J. Morgan
Richard D. Irwin, 1977
Buku Teks
Fishburn, Peter C.
John Wiley, 1964
Buku Teks