General textbooks

• James Allen. 1994.  Natural Language Understanding. 2nd edition. Addison-Wesley.
• Daniel Jurafsky and James H. Martin. 2008.Speech and Language Processing (2nd Edition). Prentice-Hall.

Programming resources 

• William Clocksin and Chris Mellish. Programming in Prolog. 4th edition. Springer Verlag, 1994. ISBN 0-38-75835-0.
• There are also various web-based Prolog courses. A good one oriented to computational linguistics is that by Blackburn, Bos, and Striegnitz: https://cs.union.edu/~striegnk/learn-prolog-now/html/index.html
• A classic book giving many useful programming examples is: Femando C.N. Pereira and Stuart M. Shieber 1987. Prolog and Natural-Language Analysis. CSLI Publications, University of Chicago Press.  Available on-line: http://www.mtome.com/Publications/PNLA/prolog-digital.pdf

Journals

• @Computational Linguistics