APA

Association for Computing Machinery, . (1968). Proceedings of the April 30--May 2, 1968, spring joint computer conference. New York, NY: ACM.

Chicago

Association for Computing Machinery, . 1968. Proceedings of the April 30--May 2, 1968, spring joint computer conference. New York, NY: ACM.

Harvard

Association for Computing Machinery, . (1968). Proceedings of the April 30--May 2, 1968, spring joint computer conference. New York, NY: ACM.

MLA

Association for Computing Machinery, . Proceedings of the April 30--May 2, 1968, spring joint computer conference. New York, NY: ACM. 1968.