Template:R:ine:CIEL
Beekes, Robert S. P. (2011年) Comparative Indo-European Linguistics: An Introduction [比較印歐語言學：導論], revised and corrected by Michiel de Vaan，2nd版，Amsterdam, Philadelphia：John Benjamins Publishing Company
Beekes, Robert S. P. (2011年) Comparative Indo-European Linguistics: An Introduction [比較印歐語言學：導論], revised and corrected by Michiel de Vaan，2nd版，Amsterdam, Philadelphia：John Benjamins Publishing Company