Intellus
©2019First EditionIntellus Open CourseISBN-13: 9781319213954
Paula S. Rothenberg
©2016Tenth EditionPaper TextISBN-13: 9781464178665
The Sociology Writing Group
©2014Seventh EditionPaper TextISBN-13: 9781429234795
Fred C. Pampel, University of Colorado, Boulder
©2007Second EditionPaper TextISBN-13: 9780716779155