General ⇒ Reference problem -- maybe do to natbib, but I'm not sure

[YzerFan19Forever]

When compiling my document (see attached file) the references look something like

(ELA), (FB), and (A1)

instead of

[ELA], [FB], and [A1]

But in the bibliography section, the brackets are correct, i.e. [<reference>].

How do I get the [<reference>] in the entire document?


P.S. I compile using

latex
dvips
ps2pdf