The imperfects- and future subjunctives of "dar"

[ElDanés]

I've been practicing conjugations of verbs for now a while, and I'm now able to conjugate regular verbs in both indicative and subjunctive, but when I was working with the irregular verb, dar, I noticed a difference in how websites represent the first person plural in imperfect (ra), imperfect (se) and future of the subjunctive. It seems like some websites represent it with an accent-marker, and others don't.

If we look at Wiktionary, they're represented:

• dieramos
• diesemos
• dieremos

But if we look at WebWorkbooks, and this site, Tomísimo, they're represented:

• diéramos
• diésemos
• diéremos

The latter representation is what I *think* is right, because it fits the representation of most other verbs, but I got confused, because Wiktionary, a hugh website, represents them in a different way.

Could someone help me out?