Assuming that one has plenty of knowledge about consumer and firm theory in microeconomics at graduate level, he/she must study input-output models or at least know how to interpret them. The rest is finding a good textbook about CGE models.
One i can recommend is Hosoe et al. (2010) [here's the link: http://www.springer.com/jp/book/9780230248144]
or
Derviş et al. (1982), a classical and still very useful [added below as a publication].
http://www.springer.com/jp/book/9780230248144
Article Kemal Dervis, Jaime de Melo and Sherman Robinson, General Eq...
Hello Sir, read relevant and seek assistance from authors that have published through it. You can send me a message or email so I can forward some relevant soft copy documents to you.