APA Style
Williams, Paul D.. (2013).
Security studies : an introduction : 2nd edition .
the usa and canada:
Routledge.
Chicago Style
Williams, Paul D..
Security studies : an introduction : 2nd edition.
the usa and canada:
Routledge,
2013.
Text.
MLA Style
Williams, Paul D..
Security studies : an introduction : 2nd edition.
the usa and canada:
Routledge,
2013.
Text.
Turabian Style
Williams, Paul D..
Security studies : an introduction : 2nd edition.
the usa and canada:
Routledge,
2013.
Print.