Sources

An astute reader should be willing to weigh everything they read, including anonymous sources.

The reporter refused to name his sources.

Surely the most curious of sources consulted is Mankind Quarterly.

We are exploring new sources, such as solar and atomic energy.

Among these there may be new sources of food fish and new species of other creatures.

For this reason, the credibility of the book's authors rests on the credibility of their sources.

We must develop the renewable energy sources.

We must develop renewable energy sources.

We'll use energy sources such as the sun and wind.

The most likely sources of energy in hot and dry regions are the wind and the sun.