National Center on Police and Community Relations. (1967). A national survey of police and community relations. U.S. Gov't. Print. Off.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNational Center on Police and Community Relations. A National Survey of Police and Community Relations. Washington: U.S. Gov't. Print. Off, 1967.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিNational Center on Police and Community Relations. A National Survey of Police and Community Relations. U.S. Gov't. Print. Off, 1967.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.