Lua APA (7ú heag.)
Thornton, J., & Beckwith, S. (1976). Environmental law. Sweet & Maxwell..
Lua i Stíl Chicago (17ú heag.)
Thornton, Justine, agus Silas Beckwith. Environmental Law. London: Sweet & Maxwell., 1976.
Lua MLA (9ú heag.)
Thornton, Justine, agus Silas Beckwith. Environmental Law. Sweet & Maxwell., 1976.
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