APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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