APA

Frei H., Association for Computing Machinery & ACM Special Interest Group on Information Retrieval. (1996). Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM.

Chicago

Frei Hans-Peter, Association for Computing Machinery and ACM Special Interest Group on Information Retrieval. 1996. Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM.

Harvard

Frei H., Association for Computing Machinery and ACM Special Interest Group on Information Retrieval. (1996). Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM.

MLA

Frei Hans-Peter, Association for Computing Machinery and ACM Special Interest Group on Information Retrieval. Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM. 1996.