Hayes, Gail Boyer
Environmental Law Institute, 1979
Buku Teks
by John Macsai ... [and others] ; illustrator, Alfred J. Hidvegi
Wiley, 1976.
Buku Teks
Breyer, Stephen G., 1938-, author
Little, Brown, 1982
Buku Teks
Weatherill, Stephen
Logman, 1997
Buku Teks
Breyer, Stephen G., 1938-, author
Little, Brown and Company, 1979
Buku Teks