Which is an example of a scholary source for an informative essay

A scholarly source is a source written by experts in a certain field of study. For example if one was researching about teenage depression and wanted a scholarly source they would go find books, article, websites, etc. written by an expert in adolescent psychology or depression.

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when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.