APA
Liebman J. B., Seif David G, Luttmer Erzo F P & National Bureau Of Economic Research. (2008). Labor Supply Responses to Marginal Social Security Benefits. Cambridge: NBER.
Chicago
Liebman Jeffrey B, Seif David G, Luttmer Erzo F P and National Bureau Of Economic Research. 2008. Labor Supply Responses to Marginal Social Security Benefits. Cambridge: NBER.
Harvard
Liebman J. B., Seif David G, Luttmer Erzo F P and National Bureau Of Economic Research. (2008). Labor Supply Responses to Marginal Social Security Benefits. Cambridge: NBER.
MLA
Liebman Jeffrey B, Seif David G, Luttmer Erzo F P and National Bureau Of Economic Research. Labor Supply Responses to Marginal Social Security Benefits. Cambridge: NBER. 2008.
