APA (7th ed.) Citation

Graduate Management Admission Council & Andersen, E. (2005). Quantitative skills interactive: Version 4.0. McGraw-Hill.

Chicago Style (17th ed.) Citation

Graduate Management Admission Council and Eugene Andersen. Quantitative Skills Interactive: Version 4.0. [New York?]: McGraw-Hill, 2005.

MLA (9th ed.) Citation

Graduate Management Admission Council and Eugene Andersen. Quantitative Skills Interactive: Version 4.0. McGraw-Hill, 2005.