Cita APA (7a ed.)

SPSS, Inc.. Chicago, Ill. (1990). SPSS/PC+ Graphics for the IBM PC/XT/AT and PS/2. SPSS Inc.

Cita Chicago Style (17a ed.)

SPSS, Inc.. Chicago, Ill. SPSS/PC+ Graphics for the IBM PC/XT/AT and PS/2. Chicago, Ill: SPSS Inc, 1990.

Cita MLA (9a ed.)

SPSS, Inc.. Chicago, Ill. SPSS/PC+ Graphics for the IBM PC/XT/AT and PS/2. SPSS Inc, 1990.