DZIECHCIARZ, Józef. Measurement of the return on investment in education and in-house training. Acta Universitatis Lodziensis. Folia Oeconomica, Poland, v. 5, n. 325, p. [51]-64, 2017. DOI: 10.18778/0208-6018.325.04. Disponível em: https://czasopisma.uni.lodz.pl/foe/article/view/661. Acesso em: 7 aug. 2026.