Allen, James
Natural language understanding
Benjamin Cummings, 1987
 Buku Teks SO
Lyle, Jane
Understanding Body Language
Chancelor Press, 1993
 Buku Teks SO
Schobeiri, Meinhard T.
Turbomachinery flow physics and dynamic performance
[, Springer], 2012
 eBooks
Groundwater flow understanding : from local to regional scale
J. Joel Carrillo R., M. Adrian Ortega G., editor
Taylor and Francis, 2008
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Natural language understanding and logic programming II
North Holland, 1988
 Buku Teks SO