APA
Blank R. M., London R A, George C C & National Bureau Of Economic Research. (1994). State Abortion Rates: The Impact Of Policies, Providers, Politics, Demographics, And Economic Environment. Cambridge, MA: NBER.
Chicago
Blank R M, London R A, George C C and National Bureau Of Economic Research. 1994. State Abortion Rates: The Impact Of Policies, Providers, Politics, Demographics, And Economic Environment. Cambridge, MA: NBER.
Harvard
Blank R. M., London R A, George C C and National Bureau Of Economic Research. (1994). State Abortion Rates: The Impact Of Policies, Providers, Politics, Demographics, And Economic Environment. Cambridge, MA: NBER.
MLA
Blank R M, London R A, George C C and National Bureau Of Economic Research. State Abortion Rates: The Impact Of Policies, Providers, Politics, Demographics, And Economic Environment. Cambridge, MA: NBER. 1994.