《新唐书·列传·卷一百三十三》
黄巢乱平，田令孜因王铎是文臣，且无战功，而第一个提议召沙陀兵来助战的是杨复光，想归大功于北司，所以罢了王铎的都统职务，论杨复光为第一功。
贼平，令孜以王鐸为儒臣且无功，而首谋召沙陀者，杨复光也，欲归重北司，故罢鐸都统，以复光功第一。
After the Huang Chao rebellion was quelled, Tian Lingzi proposed to summon the Shatuo army to help, because Wang Duo was a civil servant and had no military achievements. Yang Fuguang was the first to suggest this, so Tian wanted to give the great功 to the Northern Office. Therefore, he dismissed Wang Duo from his position as general commandant and ranked Yang Fuguang as having made the greatest contribution. 