APA

Hayne S. C., Association for Computing Machinery & ACM Special Interest Group on Supporting Group Work. (1999). Proceedings of the international ACM SIGGROUP conference on Supporting group work. New York, NY: ACM.

Chicago

Hayne Stephen C, Association for Computing Machinery and ACM Special Interest Group on Supporting Group Work. 1999. Proceedings of the international ACM SIGGROUP conference on Supporting group work. New York, NY: ACM.

Harvard

Hayne S. C., Association for Computing Machinery and ACM Special Interest Group on Supporting Group Work. (1999). Proceedings of the international ACM SIGGROUP conference on Supporting group work. New York, NY: ACM.

MLA

Hayne Stephen C, Association for Computing Machinery and ACM Special Interest Group on Supporting Group Work. Proceedings of the international ACM SIGGROUP conference on Supporting group work. New York, NY: ACM. 1999.