APA
Altonji J. G., National Bureau of Economic Research, Blom E. & Meghir C. (2012). Heterogeneity in human capital investments. Cambridge: NBER.
Chicago
Altonji Joseph G, National Bureau of Economic Research, Blom Erica and Meghir Costas. 2012. Heterogeneity in human capital investments. Cambridge: NBER.
Harvard
Altonji J. G., National Bureau of Economic Research, Blom E. and Meghir C. (2012). Heterogeneity in human capital investments. Cambridge: NBER.
MLA
Altonji Joseph G, National Bureau of Economic Research, Blom Erica and Meghir Costas. Heterogeneity in human capital investments. Cambridge: NBER. 2012.