Kengluck Tiravongchaipunt และ Ruttachai Seelajaroen. (2014) Effect of Leverage on the Growth of Total Factor Productivity: Empirical Evidence from the U.S.A. Chulalongkorn University:ม.ป.ท.Kengluck Tiravongchaipunt และ Ruttachai Seelajaroen. 2014. Effect of Leverage on the Growth of Total Factor Productivity: Empirical Evidence from the U.S.A. ม.ป.ท.:Chulalongkorn University;Kengluck Tiravongchaipunt และ Ruttachai Seelajaroen. Effect of Leverage on the Growth of Total Factor Productivity: Empirical Evidence from the U.S.A. ม.ป.ท.:Chulalongkorn University, 2014. Print.