APA (7th ed.) Citation

Yuan, Z. H. (1993). An exploration of the security patrol system in big cities.

Chicago Style (17th ed.) Citation

Yuan, Zhi Hang. An Exploration of the Security Patrol System in Big Cities. [Beijing], 1993.

MLA (8th ed.) Citation

Yuan, Zhi Hang. An Exploration of the Security Patrol System in Big Cities. 1993.