Cita APA (7th ed.)

Hedderson, J., & Fisher, M. (1993). SPSS made simple (2nd ed.). Wadsworth Pub. Co..

Cita Chicago (17th ed.)

Hedderson, John, i Melinda Fisher. SPSS Made Simple. 2nd ed. Belmont, Calif.: Wadsworth Pub. Co., 1993.

Cita MLA (8th ed.)

Hedderson, John, i Melinda Fisher. SPSS Made Simple. 2nd ed. Wadsworth Pub. Co., 1993.