Sohm, Rudolf
Duncker & Humblot, 1931
Buku Teks
Tellegen-Couperus, Olga, author
Routledge, 1993
Buku Teks
Kaser, Max, author
Vandenhoeck & Ruprecht, 1950
Buku Teks
Schulz, Fritz, author
Clarendon Press, 1953
Buku Teks
Jolowicz, H.F., author
University Press, 1961
Buku Teks