BORJAS, George. Labor Economics. New York: McGraw-Hill Education, 2020. 569 p. ISBN 978-1-26-000472-4 .
BANSAK, C., N. SIMPSON and M. ZAVODNY. The Economics of Immigration. New York: Routledge, 2020. 470 p. ISBN 978-0-36-741616-4.
BALCAR, Jiří, HOMOLOVÁ, Eva, KARÁSEK, Zdeněk, et al. (2011). Transferable competences across economic sectors: Role and importance for Employment at European level. Luxembourg: Publications Office of the European Union. 96 s. ISBN 978-92-79-20946-8 .