Cita APA (7th ed.)

SPSS Inc. (1984). SPSS X basics. McGraw-Hill.

Cita Chicago (17th ed.)

SPSS Inc. SPSS X Basics. New York: McGraw-Hill, 1984.

Cita MLA (9th ed.)

SPSS Inc. SPSS X Basics. McGraw-Hill, 1984.