Waraporn Makvisai และ Tharapong Vitidsant. (2005) Catalytic cracking of used lubricating oil on Fe/Al[subscript 2]O[subscript 3] and Fe/SiO[subscript 2]-Al[subscript 2]O[subscript 3]. Chulalongkorn University:ม.ป.ท.Waraporn Makvisai และ Tharapong Vitidsant. 2005. Catalytic cracking of used lubricating oil on Fe/Al[subscript 2]O[subscript 3] and Fe/SiO[subscript 2]-Al[subscript 2]O[subscript 3]. ม.ป.ท.:Chulalongkorn University;Waraporn Makvisai และ Tharapong Vitidsant. Catalytic cracking of used lubricating oil on Fe/Al[subscript 2]O[subscript 3] and Fe/SiO[subscript 2]-Al[subscript 2]O[subscript 3]. ม.ป.ท.:Chulalongkorn University, 2005. Print.