APA
Hotz V. J., McElroy S. W. & Sanders S. G. (1999). Teenage childbearing and its life cycle consequences : exploiting a natural experiment. Cambridge, Mass: National Bureau of Economic Research.
Chicago
Hotz V Joseph, McElroy Susan Williams and Sanders Seth G. 1999. Teenage childbearing and its life cycle consequences : exploiting a natural experiment. Cambridge, Mass: National Bureau of Economic Research.
Harvard
Hotz V. J., McElroy S. W. and Sanders S. G. (1999). Teenage childbearing and its life cycle consequences : exploiting a natural experiment. Cambridge, Mass: National Bureau of Economic Research.
MLA
Hotz V Joseph, McElroy Susan Williams and Sanders Seth G. Teenage childbearing and its life cycle consequences : exploiting a natural experiment. Cambridge, Mass: National Bureau of Economic Research. 1999.