APA
Bernard A. B., National Bureau of Economic Research, Grazzi M. & Tomasi C. (2012). Intermediaries in international trade. Cambridge: NBER.
Chicago
Bernard Andrew B, National Bureau of Economic Research, Grazzi Marco and Tomasi Chiara. 2012. Intermediaries in international trade. Cambridge: NBER.
Harvard
Bernard A. B., National Bureau of Economic Research, Grazzi M. and Tomasi C. (2012). Intermediaries in international trade. Cambridge: NBER.
MLA
Bernard Andrew B, National Bureau of Economic Research, Grazzi Marco and Tomasi Chiara. Intermediaries in international trade. Cambridge: NBER. 2012.