David Grusky 
Social Stratification, Class, Race, and Gender in Sociological Perspective, Second Edition [PDF ebook] 

The volume offers essential reading for undergraduates who need an introduction to the field, for graduate students who wish to broaden their understanding of stratification research, and for advanced scholars who seek a basic reference guide. Although most of the selections are middle-range theoretical pieces suitable for introductory courses, the anthology also includes advanced contributions on the cutting edge of research. The editor outlines a modified study plan for undergraduate students requiring a basic introduction to the field.