APA
Hurd M. D., National Bureau of Economic Research & Rohwedder S. (2011). Economic preparation for retirement. Cambridge: NBER.
Chicago
Hurd Michael D, National Bureau of Economic Research and Rohwedder Susann. 2011. Economic preparation for retirement. Cambridge: NBER.
Harvard
Hurd M. D., National Bureau of Economic Research and Rohwedder S. (2011). Economic preparation for retirement. Cambridge: NBER.
MLA
Hurd Michael D, National Bureau of Economic Research and Rohwedder Susann. Economic preparation for retirement. Cambridge: NBER. 2011.