APA (7th ed.) Citation

Li, D., & Liu, D. (1990). A fuzzy PROLOG database system. Research Studies Pr. [u.a.].

Chicago Style (17th ed.) Citation

Li, Deyi, and Dongbo Liu. A Fuzzy PROLOG Database System. Taunton, Sommerset, England: Research Studies Pr. [u.a.], 1990.

MLA (9th ed.) Citation

Li, Deyi, and Dongbo Liu. A Fuzzy PROLOG Database System. Research Studies Pr. [u.a.], 1990.