Cita APA (7a ed.)

kramer, r. L., darlin, m. Y., & root, f. R. International trade: Theory, policy, practice.

Cita Chicago Style (17a ed.)

kramer, roland L., maurice Y. darlin, y franklin R. root. International Trade: Theory, Policy, Practice.

Cita MLA (9a ed.)

kramer, roland L., et al. International Trade: Theory, Policy, Practice.