APA

Belkin N. J., Association for Computing Machinery & ACM Special Interest Group on Information Retrieval. (1997). Proceedings of the 20th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM.

Chicago

Belkin Nicholas J, Association for Computing Machinery and ACM Special Interest Group on Information Retrieval. 1997. Proceedings of the 20th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM.

Harvard

Belkin N. J., Association for Computing Machinery and ACM Special Interest Group on Information Retrieval. (1997). Proceedings of the 20th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM.

MLA

Belkin Nicholas J, Association for Computing Machinery and ACM Special Interest Group on Information Retrieval. Proceedings of the 20th annual international ACM SIGIR conference on Research and development in information retrieval. New York, NY: ACM. 1997.