Gaya APA

Green, S, B., Salkind, N, J. (1997). Using SPSS for windows : Analyzing and understanding data . New Jersey: Prentice Hall.

Gaya MLA

Green, Samuel, B.., Salkind, Neil, J.. "Using SPSS for windows : Analyzing and understanding data". New Jersey: Prentice Hall, 1997. Text.