National Academies of Sciences, E., Cohen, G., Coulthurst, A., & Alper, J. (2015). Immigration policy and the search for skilled workers: Summary of a workshop. Washington, District of Columbia: The National Academies Press.

National Academies of Sciences, Engineering, Gail Cohen, Aqila Coulthurst, and Joe Alper. Immigration Policy and the Search for Skilled Workers: Summary of a Workshop. Washington, District of Columbia: The National Academies Press, 2015.

National Academies of Sciences, Engineering, Gail Cohen, Aqila Coulthurst, and Joe Alper. Immigration Policy and the Search for Skilled Workers: Summary of a Workshop. Washington, District of Columbia: The National Academies Press, 2015.