Hill, Norman L., author
Stanford University Press, 1929
Buku Teks
Goodspeed, Stephen S., author
Oxford University Press, 1963
Buku Teks
Hill, Norman, author
Harper & Brothers, 1952
Buku Teks
Dunn, Frederick Sherwood, author
Johns Hopkins Press, 1929
Buku Teks
Waincymer, Jeffrey, author
Kluwer Law International, 2012
Buku Referensi