APA (7th ed.) Citation

(2014). Real numbers. [electronic resource]. Level 1, practice set 1.

Chicago Style (17th ed.) Citation

Real Numbers. [electronic Resource]. Level 1, Practice Set 1. 2014.

MLA (9th ed.) Citation

Real Numbers. [electronic Resource]. Level 1, Practice Set 1. 2014.

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