APA
Bryan G. T., National Bureau of Economic Research, Karlan D. & Zinman J. (2012). You can pick your friends, but you need to watch them. Cambridge: NBER.
Chicago
Bryan Gharad T, National Bureau of Economic Research, Karlan Dean and Zinman Jonathan. 2012. You can pick your friends, but you need to watch them. Cambridge: NBER.
Harvard
Bryan G. T., National Bureau of Economic Research, Karlan D. and Zinman J. (2012). You can pick your friends, but you need to watch them. Cambridge: NBER.
MLA
Bryan Gharad T, National Bureau of Economic Research, Karlan Dean and Zinman Jonathan. You can pick your friends, but you need to watch them. Cambridge: NBER. 2012.