TY  - BOOK
AU  - Reese, Shawn
TI  - The U.S. Secret Service: : An Examination and Analysis of Its Evolving Missions
PY  - 2012///
PB  - Congressional Research Service
KW  - Seguridad exterior
UR  - http://www.fas.org/sgp/crs/homesec/RL34603.pdf
ER  -