APA

Voelkl K. E., Gerber S. B., . (1999). Using SPSS for Windows. Data Analysis and Graphics. New York: Springer-Verlag.

Chicago

Voelkl K E, Gerber S B, . 1999. Using SPSS for Windows. Data Analysis and Graphics. New York: Springer-Verlag.

Harvard

Voelkl K. E., Gerber S. B., . (1999). Using SPSS for Windows. Data Analysis and Graphics. New York: Springer-Verlag.

MLA

Voelkl K E, Gerber S B, . Using SPSS for Windows. Data Analysis and Graphics. New York: Springer-Verlag. 1999.