Robert E. Ricklefs; Rick Relyea ©2015 | Seventh Edition ISBN-13: 9781429249959
Robert E. Ricklefs ©2010 | Sixth Edition ISBN-13: 9780716786979
Robert E. Ricklefs, University of Missouri, St. Louis; Gary Miller, University of Mississippi ©2000 | Fourth Edition ISBN-13: 9780716728290