Cita APA (7th ed.)

George, D. (2012). Spss for windows step by step: a: Simple guide and reference 17.0. Pearson.

Cita Chicago (17th ed.)

George, Darren. Spss for Windows Step by Step: A: Simple Guide and Reference 17.0. New Delhi: Pearson, 2012.

Cita MLA (9th ed.)

George, Darren. Spss for Windows Step by Step: A: Simple Guide and Reference 17.0. Pearson, 2012.