Hylton, Keith N, Author
Cambridge University Press, 2003
eBooks
Holmes, Oliver Wendell, Jr.
Little, Brown and Company, 1951
Buku Teks
Eisenberg, Melvin A.
Harvard University Press, 1988
Buku Teks
Vinogradoff, Paul, 1854-1925
Oxford University Press, 1970
Buku Teks
Vinogradoff, Paul, 1854-1925
Oxford University Press, 1959
Buku Teks