1. Attar, a a Gupta, P. a K., & Desai, A Study of Various Factors Affecting Labour Productivity and Methods to Improve It, Civil Engineering, 11–14, P. D. B. (n.d.)
2. Jalaei, F., & Jrade, Construction Research Congress 2014 ©ASCE 2014 140. Construction Research Congress 2014, 140–149, A. (2014)
3. Jablonski, M, Rosenblum, L, and Kunze, K., Productivity, Age, and Labor Composition Changes in the U.S. Monthly Labor Review, v 111 n 9 p 34–38 Sep (1988)
4. Contractors perspective toward factors affecting labor productivity in building construction
5. Informal Skill Formation and the Division of Labour: The Case of Korean Tiling Workers in Sydney