"eminent source" is correct and can be used in written English.
Use it to describe a person that is reliable and respected for their knowledge or abilities. For example, "She was a renowned scientist and an eminent source of information on the subject."
Model Checking is bound to be the pre-eminent source for research, teaching, and industrial practice on this important subject.
His dream is to put the Motor City back on the map as the world's pre-eminent source of clean, cost-effective and fuel-efficient engines.
The Golden Triangle, as the region where Thailand, Laos and Myanmar come together is known, was once the world's pre-eminent source of heroin.
While the military is now firmly re-established as the pre-eminent source of power in the country –and there are calls for its leader General Abdel-Fattah el-Sissi to run in presidential elections next year – the largely Islamist political forces which remain opposed to the current political transition can still command a sizeable following.
That nimble upstart known as cable television now represents the pre-eminent source for original programming.
As social media increasingly becomes the new front page, the whole notion of broadcast television as the pre-eminent source of both "breaking news" and disposable content is going to become more and more passe.
Mass-media reportage is the pre-eminent source of information about disasters in LMICs for audiences in high-income nations, and a valuable trigger for NGO fundraising.
Questioning scientific sources for that is one thing, but downplaying the devastating consequences of Chernobyl and leaving aside the world's most eminent scientific source for that is cynical.
It degrades the dyes with the help of HO radical [9], but this method requires eminent energy light irradiation source (UV light) and on oxidant.
