APA
Bingley P., National Bureau of Economic Research, Gupta N. D. & Pedersen P. J. (2011). Disability programs, health and retirement in Denmark since 1960. Cambridge: NBER.
Chicago
Bingley Paul, National Bureau of Economic Research, Gupta Nabanita Datta and Pedersen Peder J. 2011. Disability programs, health and retirement in Denmark since 1960. Cambridge: NBER.
Harvard
Bingley P., National Bureau of Economic Research, Gupta N. D. and Pedersen P. J. (2011). Disability programs, health and retirement in Denmark since 1960. Cambridge: NBER.
MLA
Bingley Paul, National Bureau of Economic Research, Gupta Nabanita Datta and Pedersen Peder J. Disability programs, health and retirement in Denmark since 1960. Cambridge: NBER. 2011.