Perc, M. (2012). Evolution of the most common English words and phrases over the centuries. The Royal Society.
Dyfyniad Arddull ChicagoPerc, Matjaž. Evolution of the Most Common English Words and Phrases Over the Centuries. The Royal Society, 2012.
Dyfyniad MLAPerc, Matjaž. Evolution of the Most Common English Words and Phrases Over the Centuries. The Royal Society, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.