The phrase "an influential source" is correct and usable in written English.
You can use it when referring to a person, organization, or piece of information that has a significant impact on opinions, decisions, or actions.
Example: "The report was considered an influential source in shaping public policy on climate change."
Alternatives: "a powerful reference" or "a significant contributor."
Breitbart will become "an influential source for the mainstream media to find out what's going on inside the White House".
McDonnell's involvement with the group was first disclosed by Health Policy Insight, an influential source of NHS analysis.
The podcast has become an influential source of commentary and analysis for policy-makers, journalists and the public.
"The program has silence gaps that shouldn't happen on the radio, and you can tell she's inexperienced," said José Cabrera Riesgo, a retired reporter for Spanish-language radio, which is an influential source of political news and commentary here.
"In the past we used to only talk quietly in coffee shops," said Cheong Yaoming, 29, executive editor of The Online Citizen, an influential source for local news and acerbic commentary.
ALBANY — Cardinal Timothy M. Dolan and New York State's bishops are calling on the Legislature to increase the minimum wage, adding an influential source of support to a proposal that has divided lawmakers along party lines.
But an equally influential source of nature imagery came from the cheesy stock photos of rainbows, waterfalls, and beaches from the built-in screensaver on her personal computer.
The event was cosponsored by Sina, the nation's biggest web portal and the host of the Weibo microblog - China's twitter, which is an increasingly influential source of news.
The Daily Show has aired since 1996 – Stewart has been presenting it since 1999 – but it rose to prominence in the waning years of the Bush administration, when various surveys and academic studies began to suggest that it had become a more influential source of news among younger viewers than mainstream, non-satirical sources.
The current findings are valuable because there is evidence that people with schizophrenia perceive the Internet as an important and influential source of information [ 19].
"You call these things a riddle," my influential source said, "and I guess that is what they are.
