APA (7th ed.) Citation

Wang, G. S. (1996). Program query language PQL system.

Chicago Style (17th ed.) Citation

Wang, Guo Sheng. Program Query Language PQL System. 1996.

MLA (8th ed.) Citation

Wang, Guo Sheng. Program Query Language PQL System. 1996.

Warning: These citations may not always be 100% accurate.