APA
,, . (2012). Law research : Principles with commentary. Germany: University Of Cologne.
Chicago
,, . 2012. Law research : Principles with commentary. Germany: University Of Cologne.
Harvard
,, . (2012). Law research : Principles with commentary. Germany: University Of Cologne.
MLA
,, . Law research : Principles with commentary. Germany: University Of Cologne. 2012.