APA (7th ed.) Citation

Grotius, H., Hakluyt, R., Welwood, W., & Armitage, D. (2004). The free sea. Liberty Fund.

Chicago Style (17th ed.) Citation

Grotius, Hugo, Richard Hakluyt, William Welwood, and David Armitage. The Free Sea. Indianapolis, Ind.: Liberty Fund, 2004.

MLA (9th ed.) Citation

Grotius, Hugo, et al. The Free Sea. Liberty Fund, 2004.