APA Citation

Harcourt School Publishers. (2009). [Twelve inch ruler/Number line]. [Orlando, Fla.]: Harcourt School Publishers.

Chicago Style Citation

Harcourt School Publishers. [Twelve Inch Ruler/Number Line]. [Orlando, Fla.]: Harcourt School Publishers, 2009.

MLA Citation

Harcourt School Publishers. [Twelve Inch Ruler/Number Line]. [Orlando, Fla.]: Harcourt School Publishers, 2009.

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