Cita APA (7a ed.)

Pugwash Conference on Science and World Affairs Egham. (1990). Towards a secure world in the twenty-first century: Proceedings of the fortieth Pugwash Conference on Science and World Affairs, Egham, UK, 15-20 September 1990. [s.n.].

Cita Chicago Style (17a ed.)

Pugwash Conference on Science and World Affairs Egham. Towards a Secure World in the Twenty-first Century: Proceedings of the Fortieth Pugwash Conference on Science and World Affairs, Egham, UK, 15-20 September 1990. Genewa [etc.]: [s.n.], 1990.

Cita MLA (9a ed.)

Pugwash Conference on Science and World Affairs Egham. Towards a Secure World in the Twenty-first Century: Proceedings of the Fortieth Pugwash Conference on Science and World Affairs, Egham, UK, 15-20 September 1990. [s.n.], 1990.