APA (7th ed.) Citation

(2016). Common core 1st grade math. Addition and subtraction equations.

Chicago Style (17th ed.) Citation

Common Core 1st Grade Math. Addition and Subtraction Equations. 2016.

MLA (9th ed.) Citation

Common Core 1st Grade Math. Addition and Subtraction Equations. 2016.

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