APA

Harper S., Association for Computing Machinery & ACM Special Interest Group on Hypertext H. a. W. (2007). Proceedings of the eighteenth conference on Hypertext and hypermedia. New York, NY: ACM.

Chicago

Harper Simon, Association for Computing Machinery and ACM Special Interest Group on Hypertext Hypermedia and Web. 2007. Proceedings of the eighteenth conference on Hypertext and hypermedia. New York, NY: ACM.

Harvard

Harper S., Association for Computing Machinery and ACM Special Interest Group on Hypertext H. a. W. (2007). Proceedings of the eighteenth conference on Hypertext and hypermedia. New York, NY: ACM.

MLA

Harper Simon, Association for Computing Machinery and ACM Special Interest Group on Hypertext Hypermedia and Web. Proceedings of the eighteenth conference on Hypertext and hypermedia. New York, NY: ACM. 2007.