Experience is not a source but a medium through which the sources speak.

Rather, every source speaks about the detailed use of it.

The news agency said the sources of the report would speak only on the condition that they not be identified by name.

Unfortunately, my best source of local gossip wasn't speaking to me at the moment.

Other sources speak of "kings", which is also not correct.

A ministerial source spoke of good will among the majority.

The sources of the assertion turned out to be two soldiers, who were identified in the article and spoke on the record.

The town was burned down 1664 (other sources speak of 1656) in the war against Sweden.

Some sources even speak directly of this period as her regency.

The source spoke on condition of anonymity because the judge's investigation isn't complete.