(2014). 2012 survey of employment in establishments with 20 or more workers: Statistics on agency-hired workers (third of a four-part series). Labstat Updates.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)"2012 Survey of Employment in Establishments with 20 or More Workers: Statistics on Agency-hired Workers (third of a Four-part Series)." Labstat Updates 2014.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)"2012 Survey of Employment in Establishments with 20 or More Workers: Statistics on Agency-hired Workers (third of a Four-part Series)." Labstat Updates, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.