latex-help

My username: artpletcher@gmail.com, Note: Using "Revtex-1-4"
My question:
How can I change my reference format (On left) to look like the format (on right)? 
Notice my references are two column and lack the title of "REFERENCES"

My file name:
"ccc-----------Cosmology_TC_and_TD_041817 (Copy)"
URL: https://www.sharelatex.com/project/58f288c912a600d06b9487f7


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