Lua APA (7ú heag.)
Levi, W. (1974). International politics: Foundations of the system. University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)
Levi, Werner. International Politics: Foundations of the System. Minneapolis: University of Minnesota Press, 1974.
Lua MLA (9ú heag.)
Levi, Werner. International Politics: Foundations of the System. University of Minnesota Press, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.