U.S. Customs and Border Protection. Office of Field Operations. (2018). CBP officer entrance exam preparation guide (Versions 2018/11.). U.S. Department of Homeland Security, U.S. Customs and Border Protection Field Operations.
Chicago Style (17th ed.) CitationU.S. Customs and Border Protection. Office of Field Operations. CBP Officer Entrance Exam Preparation Guide. Versions 2018/11. [Washington, D.C.]: U.S. Department of Homeland Security, U.S. Customs and Border Protection Field Operations, 2018.
MLA (9th ed.) CitationU.S. Customs and Border Protection. Office of Field Operations. CBP Officer Entrance Exam Preparation Guide. Versions 2018/11. U.S. Department of Homeland Security, U.S. Customs and Border Protection Field Operations, 2018.
Warning: These citations may not always be 100% accurate.