Gaya APA
Williams, Paul D.. (2008).
Security studies: an introduction (13th ed).
London:
Routledge.
Gaya Chicago
Williams, Paul D..
Security studies: an introduction.
13th ed
London:
Routledge,
2008.
BUKU.
Gaya MLA
Williams, Paul D..
Security studies: an introduction.
13th ed
London:
Routledge,
2008.
BUKU.
Gaya Turabian
Williams, Paul D..
Security studies: an introduction.
13th ed
London:
Routledge,
2008.
BUKU.