APA
Case A., Katz Lf, . (1991). The Company You Keep: The Effects Of Family And Neighborhood On Disadvantaged Youths. Cambridge, MA: NBER.
Chicago
Case AC, Katz Lf, . 1991. The Company You Keep: The Effects Of Family And Neighborhood On Disadvantaged Youths. Cambridge, MA: NBER.
Harvard
Case A., Katz Lf, . (1991). The Company You Keep: The Effects Of Family And Neighborhood On Disadvantaged Youths. Cambridge, MA: NBER.
MLA
Case AC, Katz Lf, . The Company You Keep: The Effects Of Family And Neighborhood On Disadvantaged Youths. Cambridge, MA: NBER. 1991.