sourced

Again, the reasoning sounds, well, reasonable, and is sourced to a respectable organization, the Samaritans.

Media outlets “crowd sourced” the project, asking readers to help wade through the 24,000 pages of Palin emails.

It demonstrated that he was alive, contradicting thinly-sourced claims that he had been killed in airstrikes earlier in the month.

Many of the quotes are mysteriously sourced, apocryphal, or misattributed.

In 2010, The New York Times ran a well-sourced story that helped to undermine the cover-up.