kramer, r. L., darlin, m. Y., & root, f. R. International trade: Theory, policy, practice.
芝加哥风格引文kramer, roland L., maurice Y. darlin, 与 franklin R. root. International Trade: Theory, Policy, Practice.
MLA引文kramer, roland L., et al. International Trade: Theory, Policy, Practice.
警告：这些引文格式不一定是100％准确.