Spector, Paul E. Research designs / Paul E. Spector. - Beverly Hills : Sage Publications, c1981. - 80 p. : ill. ; 22 cm. - A Sage university paper. Quantitative applications in the social sciences ; no. 07-023 . - no. 07-023. Sage university papers series. . Bibliography: p. 78-80. ISBN: 0803917090 (pbk.) : Subjects--Topical Terms: Social sciences--Research. Dewey Class. No.: 300.72 / SPR 1981