Mexico
Constitution, Federal republic, Presidential system
Enrique Nieto
China
Single-party state, Communist state, Socialist state
Hu Jianto
Parliamentary system, Democracy, Republic
Pranab Mukherjee
Afghanistan
Presidential system, Islamic republic
Hamid Karzai
Islamic republic, Unitary state, Theocracy
Mahmoud Ahmadinejad
Liberal democracy, Parliamentary system
Shimon Peres
Democracy
Angela muckel
United Kindom
Hereditary monarchy
Queen Elizabeth 11 of the United Kingdom
David Cameron
Semi-presidential system
Fancois Hollande
Republic
Dilma Rousseff
Federal republic
Hugo Chaves
Saudi Arabia
Monarchy
Abdullah of Saudi Arabia