In addition to scholarly sources, SU Libraries provides access to many popular business periodicals. The business world moves fast, sometimes the information you need won't be in a peer-reviewed scholarly source, you may need quarterly earnings reports, 10-k reports, stock information, etc. So, oftentimes news sources and online government filings will provide important information when researching for business.
While not a "scholarly" or "peer-reviewed" source, it would be unwise to discount these sources of information because they do not fit the usual academic research mold. Just be sure to evaluate your sources critically.