De Ville, Jacques
Birkbeck Law Press, 2017
Buku Teks
Wade, E.C.S. (Emlyn Capel Stewart)
Longmans Green, 1951
Buku Teks
Kortmann, C.A.J.M.
Kluwer Law International, 2007
Buku Teks
Laurel, Jose P.
Lyceum Press, 1966
Buku Referensi
Landsberg, Brian K.
Thomson/West, 2007
Buku Teks SO