APA
Ellison G., Glaeser E L & National Bureau Of Economic Research. (1994). Geographic Concentration In U S Manufacturing Industries: A Dartboard Approach. Cambridge, MA: NBER.
Chicago
Ellison G, Glaeser E L and National Bureau Of Economic Research. 1994. Geographic Concentration In U S Manufacturing Industries: A Dartboard Approach. Cambridge, MA: NBER.
Harvard
Ellison G., Glaeser E L and National Bureau Of Economic Research. (1994). Geographic Concentration In U S Manufacturing Industries: A Dartboard Approach. Cambridge, MA: NBER.
MLA
Ellison G, Glaeser E L and National Bureau Of Economic Research. Geographic Concentration In U S Manufacturing Industries: A Dartboard Approach. Cambridge, MA: NBER. 1994.