Jukkapun Kaewprom และผู้แต่งคนอื่นๆ. (2015) Carbon footprint of organization: case studies of the petroleum and petrochemical college and office of the president, Chulalongkorn University. Chulalongkorn University:ม.ป.ท.Jukkapun Kaewprom และผู้แต่งคนอื่นๆ. 2015. Carbon footprint of organization: case studies of the petroleum and petrochemical college and office of the president, Chulalongkorn University. ม.ป.ท.:Chulalongkorn University;Jukkapun Kaewprom และผู้แต่งคนอื่นๆ. Carbon footprint of organization: case studies of the petroleum and petrochemical college and office of the president, Chulalongkorn University. ม.ป.ท.:Chulalongkorn University, 2015. Print.