APA (7th ed.) Citation

(2017). Challenges Facing Law Enforcement in the 21st Century. ProQuest.

Chicago Style (17th ed.) Citation

Challenges Facing Law Enforcement in the 21st Century. Bethesda, Md.: ProQuest, 2017.

MLA (9th ed.) Citation

Challenges Facing Law Enforcement in the 21st Century. ProQuest, 2017.

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