Thirlway, Hugh
The sources of international law
Oxford University Press, 2014
 Buku Teks SO
Hoof, G.J.H. van
Pemikiran kembali sumber-sumber hukum internasional = Rethinking the sources of international law
Alumni, 2000
 Buku Teks SO
International investment law : the sources of rights and obligations
BRILL, 2012
 Buku Teks
The Canadian yearbook of international law = Annuaire Canadien de droit international
editor in chief, C.B. Bourne
University of British Columbia Press, 1978-1982
 Buku Teks SO
Anzilotti, Dionisio
Cours de droit international
Recueil Sirey, 1929
 Buku Teks SO