Gregory, P. R., & Stuart, R. C. (2014). The global economy and its economic systems. South-Western, Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Gregory, Paul R., agus Robert C. Stuart. The Global Economy and Its Economic Systems. Australia: South-Western, Cengage Learning, 2014.
Lua MLA (9ú heag.)Gregory, Paul R., agus Robert C. Stuart. The Global Economy and Its Economic Systems. South-Western, Cengage Learning, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.