Citazione Stile APA (7a Edizione)

Grorge, D., & Mallery, P. (2014). IBM statistics 21 step by step: A simple guide and reference (13th ed.). Pearson Education.

Citazione stile Chigago Style (17a edizione)

Grorge, Darren, e Paul Mallery. IBM Statistics 21 Step by Step: A Simple Guide and Reference. 13th ed. U.S.A.: Pearson Education, 2014.

Citatione MLA (8a ed.)

Grorge, Darren, e Paul Mallery. IBM Statistics 21 Step by Step: A Simple Guide and Reference. 13th ed. Pearson Education, 2014.