Cita APA (7a ed.)

Hull, C. H., & Nie, N. H. (1981). SPSS update 7-9: New procedures and facilities for releases 7-9. McGraw-Hill.

Cita Chicago Style (17a ed.)

Hull, C. Hadlai, y Norman H. Nie. SPSS Update 7-9: New Procedures and Facilities for Releases 7-9. New York [etc.]: McGraw-Hill, 1981.

Cita MLA (9a ed.)

Hull, C. Hadlai, y Norman H. Nie. SPSS Update 7-9: New Procedures and Facilities for Releases 7-9. McGraw-Hill, 1981.