Cita APA (7a ed.)

Ricker, J., & Saywell, J. (1973). The world since 1945: The crisis of modern civilization. Clarke, Irwin.

Cita Chicago Style (17a ed.)

Ricker, John, y John Saywell. The World Since 1945: The Crisis of Modern Civilization. Toronto [u.a.]: Clarke, Irwin, 1973.

Cita MLA (9a ed.)

Ricker, John, y John Saywell. The World Since 1945: The Crisis of Modern Civilization. Clarke, Irwin, 1973.