Dyfyniad APA

George, D. SPSS for windows step by step: A simple guide and reference (10th ed.). Pearson Education Inc.

Dyfyniad Arddull Chicago

George, Darren. SPSS for Windows Step by Step: A Simple Guide and Reference. 10th ed. New Delhi: Pearson Education Inc.

Dyfyniad MLA

George, Darren. SPSS for Windows Step by Step: A Simple Guide and Reference. 10th ed. Pearson Education Inc.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.