[ska]

If it's an undergrad project, it absolutely should cite properly; so that is at least worth pointing out.

To be fair though, posters are often a bit sloppy this way, and in context supposed to be supported other ways.

[tim333]

It's a one page summary with pictures rather than a research paper or such like. There's quite likely some article with sources elsewhere.

[ska]

It's a scientific poster layout, very standard. They typically have some citation, but only major ones.