kramer, r. L., darlin, m. Y., & root, f. R. International trade: Theory, policy, practice.
Lua i Stíl Chicago (17ú heag.)kramer, roland L., maurice Y. darlin, agus franklin R. root. International Trade: Theory, Policy, Practice.
Lua MLA (9ú heag.)kramer, roland L., et al. International Trade: Theory, Policy, Practice.
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