Addy Adisorn Vutikullird และ Pornkamol Traiwittayanggoon. (2007) The change and fluctuation in the price of oil and their effects on unemployment in the United States of America. Chulalongkorn University:ม.ป.ท.Addy Adisorn Vutikullird และ Pornkamol Traiwittayanggoon. 2007. The change and fluctuation in the price of oil and their effects on unemployment in the United States of America. ม.ป.ท.:Chulalongkorn University;Addy Adisorn Vutikullird และ Pornkamol Traiwittayanggoon. The change and fluctuation in the price of oil and their effects on unemployment in the United States of America. ม.ป.ท.:Chulalongkorn University, 2007. Print.