Cita APA (7th ed.)

(1994). SPSS 6.1 for Windows: Student version. Prentice-Hall.

Cita Chicago (17th ed.)

SPSS 6.1 for Windows: Student Version. Englewood Cliffs, N.J: Prentice-Hall, 1994.

Cita MLA (9th ed.)

SPSS 6.1 for Windows: Student Version. Prentice-Hall, 1994.