APA استشهاد

Voelkl, K. E. (1999). Using SPSS for windows: Data analysis and graphics. Springer.

استشهاد بنمط شيكاغو

Voelkl, Kristin E. Using SPSS for Windows: Data Analysis and Graphics. New York: Springer, 1999.

MLA استشهاد

Voelkl, Kristin E. Using SPSS for Windows: Data Analysis and Graphics. Springer, 1999.