To avoid potential copyright violations, it's always best to link to articles rather than copying & pasting the text or uploading PDF to D2L.
To share articles only available through the PSU Library, you may need to find a persistent link (a link that doesn't expire when the browser is closed; different sources may call it differently) rather than using the URL in the address bar directly. Here are some examples:
Library catalog: on the right side of the results page, click on LINK/URL, then click on COPY TO CLIPBOARD
Wall Street Journal: on the article page, click on the tab Abstract/Details (or just Details), then scroll down to copy the full Document URL:
Portland Business Journal: just use the URL in the address bar.
Business Source Premier: on the right side of the article page, under Tools, click on Permalink and use that link.