Cita APA

 Helbig, H. (2006).  Knowledge representation and the semantics of natural language.  Springer.

Chicago Style Citation

 Helbig, Hermann.  Knowledge Representation and the Semantics of Natural Language.  Springer, 2006.

Cita MLA

 Helbig, Hermann.  Knowledge Representation and the Semantics of Natural Language.  Springer, 2006.

Atenció: Aquestes cites poden no estar 100% correctes.