Παραπομπή APA

Sorenson, O. Zoltan J. Acs, Catherine Armington: Entrepreneurship, geography, American economic growth.

Παραπομπή Chicago Style

Sorenson, Olav. Zoltan J. Acs, Catherine Armington: Entrepreneurship, Geography, American Economic Growth.

Παραπομπή MLA

Sorenson, Olav. Zoltan J. Acs, Catherine Armington: Entrepreneurship, Geography, American Economic Growth.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.