Cita APA (7th ed.)

Shaffer, R. A. (1999). SPSS for windows version 9.0: A basic tutorial. (includes disk). Mcgraw-Hill.

Cita Chicago (17th ed.)

Shaffer, Richard A. SPSS for Windows Version 9.0: A Basic Tutorial. (includes Disk). New York: Mcgraw-Hill, 1999.

Cita MLA (9th ed.)

Shaffer, Richard A. SPSS for Windows Version 9.0: A Basic Tutorial. (includes Disk). Mcgraw-Hill, 1999.