Gaya APA

Wonnacott, R, J., Wonnacott, T, H. (1985). Introductory statistics (4th ed). New York: John Wiley.

Gaya MLA

Wonnacott, Ronald, J.., Wonnacott, Thomas, H.. "Introductory statistics". 4th ed New York: John Wiley, 1985. Text.