Cita APA (7a ed.)

Graham, H. D., & Gurr, T. R. (1969). Violence in America. Violence in America historical and comparative perspectives.

Cita Chicago Style (17a ed.)

Graham, Hugh Davis, y Ted Robert Gurr. "Violence in America." Violence in America Historical and Comparative Perspectives 1969.

Cita MLA (8a ed.)

Graham, Hugh Davis, y Ted Robert Gurr. "Violence in America." Violence in America Historical and Comparative Perspectives, 1969.