Cozby, Paul C. Methods in behavioral research / Paul C. Cozby. - 8th ed. - Boston, Mass. : McGraw-Hill, c2004. - 396 p. : ill. ; 24 cm. ISBN: 0072942754 (pbk.) Subjects--Topical Terms: Psychology--Research--Methodology.Social sciences--Methodology. Dewey Class. No.: 150.72 / COZ