Cita APA (7a ed.)

Spector, P. E. (c 1981). Research designs. Sage University papers / Quantitative applications in the social sciences.

Cita Chicago Style (17a ed.)

Spector, Paul E. "Research Designs." Sage University Papers / Quantitative Applications in the Social Sciences c 1981.

Cita MLA (9a ed.)

Spector, Paul E. "Research Designs." Sage University Papers / Quantitative Applications in the Social Sciences, c 1981.