Cita APA (7th ed.)

Leech, N. L., Barrett, K. C., & Morgan, G. A. (2005). SPSS for intermediate statistics: Use and interpretation (2nd ed.). L. Erlbaum Associates.

Cita Chicago (17th ed.)

Leech, Nancy L., Karen Caplovitz Barrett, i George A. Morgan. SPSS for Intermediate Statistics: Use and Interpretation. 2nd ed. Mahwah, N.J: L. Erlbaum Associates, 2005.

Cita MLA (9th ed.)

Leech, Nancy L., et al. SPSS for Intermediate Statistics: Use and Interpretation. 2nd ed. L. Erlbaum Associates, 2005.