APA
Harris J. E., Sosa Rubi Sandra G & National Bureau Of Economic Research. (2009). Impact of seguro popular on prenatal visits in Mexico, 2002. Cambridge: NBER.
Chicago
Harris Jeffrey E, Sosa Rubi Sandra G and National Bureau Of Economic Research. 2009. Impact of seguro popular on prenatal visits in Mexico, 2002. Cambridge: NBER.
Harvard
Harris J. E., Sosa Rubi Sandra G and National Bureau Of Economic Research. (2009). Impact of seguro popular on prenatal visits in Mexico, 2002. Cambridge: NBER.
MLA
Harris Jeffrey E, Sosa Rubi Sandra G and National Bureau Of Economic Research. Impact of seguro popular on prenatal visits in Mexico, 2002. Cambridge: NBER. 2009.