Review of the Convention on Contracts For the International Sale of Goods (CISG)
edited by Cornell International Law Journal
Kluwer law international, 1995
 Buku Teks
Johnston, Daniel
International petroleum fiscal system and production sharing contracts
Penwell Books, 1994
 Buku Teks
Commentary on the UNIDROIT principles of international commercial contracts (PICC)
Stefan Vogenauer, editor
Oxford University Press, 2015
 Buku Teks
Farnsworth, E. Allan
Contracts
Little, Brown, 1990
 Buku Teks
Calamari, John D.
Contracts
West Publishing, 1990
 Buku Teks