APA (7th ed.) Citation

Teachers TV (Television Channel). (2009). Surface area: Octagon. Teachers TV/UK Dept. of Education.

Chicago Style (17th ed.) Citation

Teachers TV (Television Channel). Surface Area: Octagon. [London]: Teachers TV/UK Dept. of Education, 2009.

MLA (9th ed.) Citation

Teachers TV (Television Channel). Surface Area: Octagon. Teachers TV/UK Dept. of Education, 2009.

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