Guiomar, J. Vidal de La Blache's 'Geography of France': Jean-Yves Guiomar. Traditions.(1997).
Lua i Stíl Chicago (17ú heag.)Guiomar, Jean-Yves. "Vidal De La Blache's 'Geography of France': Jean-Yves Guiomar." Traditions.(1997) .
Lua MLA (8ú heag.)Guiomar, Jean-Yves. "Vidal De La Blache's 'Geography of France': Jean-Yves Guiomar." Traditions.(1997), .
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