'main reference' is a correct and usable phrase in written English.
It is often used in academic writing as an indication of where primarily information can be found. For example, "This study relies on Smith (2020) as its main reference."
A year ago national team coach Reinaldo Rueda referred to him as "the main reference point for Ecuadorian football, as a result of everything he has achieved".
"He was standing behind the main reference counter fielding questions from the masses," Mr. Nasaw said.
With Ailes' help, I find the main reference, detailing the holdings of the king, who more or less owned Kingston.
It's surely no coincidence that this was the main reference point for Mr. Pelt's set.
This was echoed by the pro-Palestinian London based Middle East Monitor (Link) which is a main reference point for British Muslims on the Palestinian issue.
The chap in the video clearly hasn't: he's confused it with School Library, Eton's main reference library, and the one he's actually standing outside.
Ronaldo is the main reference point up front but does not want to get tied up in the centre, surrounded by opponents.
With BIM, the 3-D model becomes the main reference, and any 2-D drawings produced from it merely perform a minor role.
Yet if Kitaj's self-exposure is uncontrolled, at the same time he is making a point about emotional abandon in art; Cézanne's art, the main reference point of these works, betrays an almost pathological state of erotic turmoil.
(In the first Clinton-Trump debate, the main reference to disruptive technology concerned Clinton's e-mail debacle, and despite all the talk about job losses, neither candidate addressed the potential impact of automation).
Nabokov's allusions are many and various, but surely one main reference here is to Elizabeth Barrett Browning's "Aurora Leigh," her book-length poem describing the growth of an artist.
