Cite international treaties, agreements, or conventions as follows:
Title, names of countries /parties (if applicable) , date of signature, treaty series reference(s), in force date.
International Covenant on Civil and Political Rights, 19 December 1966, 999 U.N.T.S. 171, (entered into force 23 March 1976).
In the above example the parties are not named, because it is a multilateral treaty.
Consult the Harvard Bluebook or the Canadian Guide to Uniform Legal Citation for further explanations.