Cita APA (7th ed.)

(1975). Statistical package for the social sciences (S.P.S.S.). McGraw Hill.

Cita Chicago (17th ed.)

Statistical Package for the Social Sciences (S.P.S.S.). New York: McGraw Hill, 1975.

Cita MLA (9th ed.)

Statistical Package for the Social Sciences (S.P.S.S.). McGraw Hill, 1975.