APA (7th ed.) Citation

Barber, P. (2006). Rectangles. Great Britain.

Chicago Style (17th ed.) Citation

Barber, Patti. Rectangles. United Kingdom: Great Britain, 2006.

MLA (9th ed.) Citation

Barber, Patti. Rectangles. Great Britain, 2006.

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