Citations are included when information from external sources is used. It helps not to take credit that is not ours and avoid plagiarizing. Thus, by using citations we give others credit and grant our research or article is trustworthy and useful.
Ex
I was so excited for Abby
But I would tell her to look up and heels down.
If her horse bucked she would fall off because she is unbalanced,
my hobby is riding a horse....... <span />
Yep. it’s a fragment because it’s not a complete thought