APA
Lepard Brian D,, . (2010). Customary international law : A new theory with practical applications. Cambridge: Cambridge University Press.
Chicago
Lepard Brian D,, . 2010. Customary international law : A new theory with practical applications. Cambridge: Cambridge University Press.
Harvard
Lepard Brian D,, . (2010). Customary international law : A new theory with practical applications. Cambridge: Cambridge University Press.
MLA
Lepard Brian D,, . Customary international law : A new theory with practical applications. Cambridge: Cambridge University Press. 2010.