This year a new United Nations Guide for MUN has been produced by the United Nations.
The United Nations Guide for MUN is written for those who organize Model UN simulations. The aim of the guide is to provide information about the structure of the UN as well as the procedures and processes used for reaching decisions so that the leaders of MUN programmes will be able to organize simulations of meetings that accurately represent how the UN actually functions.
You can read the United Nations Guide for MUN here.
In addition there are additional resources to be used in conjunction with the United Nations Guide for MUN: