APA (7th ed.) Citation

Olsen, E. (2014). Microsoft Excel: Multiple worksheets & external data. InfiniteSkills.

Chicago Style (17th ed.) Citation

Olsen, Erin. Microsoft Excel: Multiple Worksheets & External Data. [Place of publication not identified]: InfiniteSkills, 2014.

MLA (8th ed.) Citation

Olsen, Erin. Microsoft Excel: Multiple Worksheets & External Data. InfiniteSkills, 2014.

Warning: These citations may not always be 100% accurate.