Gaya APA
Beasley, R, K. (2013).
Foreign policy in comparative perspective: domestic and international influences on state behavior (2nd ed.).
America:
CQ Press.
Gaya MLA
Beasley, Ryan, K..
"Foreign policy in comparative perspective: domestic and international influences on state behavior".
2nd ed.
America:
CQ Press,
2013.
Buku.