APA
Michalopoulos S., National Bureau of Economic Research & Papaioannou E. (2014). On the ethnic origins of African development chiefs and pre-colonial political centralization. Cambridge: NBER.
Chicago
Michalopoulos Stelios, National Bureau of Economic Research and Papaioannou Elias. 2014. On the ethnic origins of African development chiefs and pre-colonial political centralization. Cambridge: NBER.
Harvard
Michalopoulos S., National Bureau of Economic Research and Papaioannou E. (2014). On the ethnic origins of African development chiefs and pre-colonial political centralization. Cambridge: NBER.
MLA
Michalopoulos Stelios, National Bureau of Economic Research and Papaioannou Elias. On the ethnic origins of African development chiefs and pre-colonial political centralization. Cambridge: NBER. 2014.