Liebowitz, J. (1990). Expert Systems for Business & Management. Yourdon Press.
Lua i Stíl Chicago (17ú heag.)Liebowitz, Jay. Expert Systems for Business & Management. Englewood Cliffs, N.J.: Yourdon Press, 1990.
Lua MLA (9ú heag.)Liebowitz, Jay. Expert Systems for Business & Management. Yourdon Press, 1990.
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