Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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