http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
study on fluctuation of oil price and its effect on MAS Berhad
Mohd Syafiq bin Mohd Azli, Shapudin bin Johari, Shahirah Bt Muhammad Iberahim.
Organization of Petroleum exporting countries