My only encounter with this horror (including the layout of the entire
document, not just the bibliography) is my daughter in a US high school
(perhaps similar to a "comprehensive") is faced with this requirement
regularly. But presumably those school teachers learn this at university.
There is one particular paper (done over the course of more than a year)
for which they were told to follow MLA formatting to the letter. This is
harder to achieve than you might imagine because specific guidelines the
kids were pointed to have samples that contradict the stated rules.
It also turned out that the teacher was lying when saying that it must
follow the MLA format. They have their own "in their heads" format that
they don't tell you up front (or provide samples for) that they want it
to comply with that you are only told about in the later stages of
submitting drafts.
So the cls that I was nicely building up for adhering to "MLA to the
letter" suddenly had me throwing in a bunch of ad hoc "for this teacher"
changes one night, so they aren't nicely compartmentalized. (Thus making
this class not close to ready for CTAN).
For example the paper title on the first full text page must be one inch
from the top of the paper, but the title "Abstract" on the preceding
page must be two inches from the top edge of the paper. The title page
and table of contents pages had their own dimensions.
Of course all this was nothing compared to what my daughter had to go
through. The topic that had been approved in November 2014 actually
violated the rules (it included a book that that was part of regular
course work) and she was only told about this in September 2015.
The good news with that is that as "Crime and Punishment" is no longer
part of her topic (Now something like "Necessity of Faith in
\textit{Life of Pi}" instead of a contrast between the two) is that I
don't have to use a typeface that both satisfies the the teacher and
does Cyrillic.