| Citation | Verified | Memento | |
|---|---|---|---|
| 📖 | http://www.icifactbook.org/pdf/2013_factbook.pdf | 2016.04.27 |
|
| 📖 | http://www.bls.gov/news.release/conemp.nr0.htm | 2016.04.27 |
|
| 📖 | http://about.bloomberglaw.com/law-reports/staffing-firms-added-nearly-1-million-jobs-over-four-years-since-recession-asa-says/ | 2016.04.27 |
|