Wallace, Rebecca M.M.
International law : a student introduction
Sweet & Maxwell, 1992
 Buku Teks SO
Potter, Pitman B.
An introduction to the study of international organization
Appleton-Century-Crofts, 1948
 Buku Teks SO
Wallace, Rebecca M.M.
International law
Sweet & Maxwell, 2013
 Buku Teks SO
Anzilotti, Dionisio
Cours de droit international
Recueil Sirey, 1929
 Buku Teks SO
Wolfke, Karol
Custom in present international law / Karol Wolfke
Martinus Nijhoff , 1993
 Buku Teks SO