When copying text from the source article make sure you read over the text and edit it if necessary. A good example is when a site writes "We" or "I" , as this should then be replaced with the site's or person's name, or you can quote the source. Forum post are source able when they're a industry professional.

At this point I'm willing to say you should link to the forum instead because the article has almost no info. I figured since you're the author of both posts, either bulk up this post or use the forum link https://forums.oneplus.net/threads/oneplus-one-official-cyanogenmod-12-nightly-version-lollipop-pictures-and-screenshots.236304/#post-8993476