APA

Ringger E., . (2009). Proceedings of the NAACL HLT 2009 Workshop on Active Learning for Natural Language Processing. United States: Association for Computational Linguistics.

Chicago

Ringger Eric, . 2009. Proceedings of the NAACL HLT 2009 Workshop on Active Learning for Natural Language Processing. United States: Association for Computational Linguistics.

Harvard

Ringger E., . (2009). Proceedings of the NAACL HLT 2009 Workshop on Active Learning for Natural Language Processing. United States: Association for Computational Linguistics.

MLA

Ringger Eric, . Proceedings of the NAACL HLT 2009 Workshop on Active Learning for Natural Language Processing. United States: Association for Computational Linguistics. 2009.