APA (7th ed.) Citation

Helft, N., Inoue, K., & Poole, D. (1991). Query answering for circumscription.

Chicago Style (17th ed.) Citation

Helft, Nicolas, Katsumi Inoue, and David Poole. Query Answering for Circumscription. Tokyo, Japan, 1991.

MLA (9th ed.) Citation

Helft, Nicolas, et al. Query Answering for Circumscription. 1991.