APA (7th ed.) Citation

Brock, P., & Socknat, T. P. (1999). Challenge to Mars: Pacifism From 1918 to 1945.

Chicago Style (17th ed.) Citation

Brock, Peter, and Thomas P. Socknat. Challenge to Mars: Pacifism From 1918 to 1945. 1999.

MLA (9th ed.) Citation

Brock, Peter, and Thomas P. Socknat. Challenge to Mars: Pacifism From 1918 to 1945. 1999.

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