Ricker, J. C., & Saywell, J. T. (1976). The emergence of Europe. Clarke, Irwin & Co..
Lua i Stíl Chicago (17ú heag.)Ricker, John C., agus John T. Saywell. The Emergence of Europe. Toronto: Clarke, Irwin & Co., 1976.
Lua MLA (8ú heag.)Ricker, John C., agus John T. Saywell. The Emergence of Europe. Clarke, Irwin & Co., 1976.
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