APA (7th ed.) Citation

AdaTEC, Association for Computing Machinery, SIGAda, & SIGAda (Conference). (1981). Ada letters: A bimonthly publication of AdaTEC. ACM.

Chicago Style (17th ed.) Citation

AdaTEC, Association for Computing Machinery, SIGAda, and SIGAda (Conference). Ada Letters: A Bimonthly Publication of AdaTEC. New York, N.Y.: ACM, 1981.

MLA (9th ed.) Citation

AdaTEC, et al. Ada Letters: A Bimonthly Publication of AdaTEC. ACM, 1981.