I'm writing a argumentative essay and i found my evidence on a website. how do i cite the evidence into my essay?

Which is best evidence that mary is beginning to change

Write one paragraph that evaluates the effectiveness of jack zipes’s essay.

How does this excerpt develop the central idea that espionage during the civil war was often carried out by untrained citizens? it enhances the reader’s understanding by explaining why training was unnecessary. it changes the reader’s perception of what information a spy was able to obtain. it explains an ordinary person’s motivation for conducting espionage against the enemy. it adds moral complexity to espionage, due to the use of secret and dangerous methods.