Whats a different way to say "proof of this is..."?

Question

please dont say something like....proof of this is...on page...

because i'm doing the format of QUOTE HERE (name, page)

Answer 1

Such proof . . .

Supporting (my answer. . . ). . .  (something along that line)

Answer 2

evidence of

Answer 3

depicted by..

emphasised by..

an example is...

Answer 4

"Evidence that supports this matter..."

"One source that proves this is...