APA (7th ed.) Citation

Oppenheim, L. (2010). The Future of International Law. Project Gutenberg.

Chicago Style (17th ed.) Citation

Oppenheim, L. The Future of International Law. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Oppenheim, L. The Future of International Law. Project Gutenberg, 2010.

Warning: These citations may not always be 100% accurate.