Guidelines for proper referencing of the works of others, http://www.ub.umu.se/en/write/references/writing-references-oxford
A database where you can find the current versions of copyright law in almost any country in the world and can check what concrete rules are applicable in your country (you can also get this information from the website of the Copyright Office in your country), http://www.wipo.int/wipolex/en/
The Berne Convention for the Protection of Literary and Artistic Works (1886), http://www.wipo.int/wipolex/en/