APA Citation

 Giarratano, J. C. (2005).  Expert systems: Principles and programming.  PWS Pub. Co.

Chicago Style Citation

 Giarratano, Joseph C.  Expert Systems: Principles and Programming.  PWS Pub. Co, 2005.

MLA Citation

 Giarratano, Joseph C.  Expert Systems: Principles and Programming.  PWS Pub. Co, 2005.

Warning: These citations may not always be 100% accurate.