Cita APA (7th ed.)

Healey F. Joseph. (2012). Statistics (9th ed.). Wadsworths.

Cita Chicago (17th ed.)

Healey F. Joseph. Statistics. 9th ed. Australia: Wadsworths, 2012.

Cita MLA (9th ed.)

Healey F. Joseph. Statistics. 9th ed. Wadsworths, 2012.