Leith, P., & Ingram, P. (1988). The Jurisprudence of orthodoxy: Queen's University essays on H.L.A. Hart. Routledge.
Lua i Stíl Chicago (17ú heag.)Leith, Philip, agus Peter Ingram. The Jurisprudence of Orthodoxy: Queen's University Essays on H.L.A. Hart. London: Routledge, 1988.
Lua MLA (9ú heag.)Leith, Philip, agus Peter Ingram. The Jurisprudence of Orthodoxy: Queen's University Essays on H.L.A. Hart. Routledge, 1988.
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