APA (7th ed.) Citation

Ricker, J. C., & Saywell, J. T. (1969). Europe and the modern world. Clarke, Irwin.

Chicago Style (17th ed.) Citation

Ricker, John C., and John T. Saywell. Europe and the Modern World. Toronto: Clarke, Irwin, 1969.

MLA (9th ed.) Citation

Ricker, John C., and John T. Saywell. Europe and the Modern World. Clarke, Irwin, 1969.