Clark , E. C. (1980). Practical Jurisprudence: A Comment On Austin. University Press.
Lua i Stíl Chicago (17ú heag.)Clark , E. C. Practical Jurisprudence: A Comment On Austin. Cambridge: University Press, 1980.
Lua MLA (9ú heag.)Clark , E. C. Practical Jurisprudence: A Comment On Austin. University Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.