When working with sources a writer can avoid plagiarism by

Being sure not to copy. Make it your own. Like change the wording. Be sure to give credit as well.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

a drastic rise in oil prices ended decades of postwar.