Helpman, E. (1978). A Theory of International Trade Under Uncertainty. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Helpman, Elhanan. A Theory of International Trade Under Uncertainty. ELSEVIER, 1978.
Lua MLA (8ú heag.)Helpman, Elhanan. A Theory of International Trade Under Uncertainty. ELSEVIER, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.