APA (7th ed.) Citation

Ratnayake, W. (2008). Mathematics Grade 11. Sadeepa Publishing House.

Chicago Style (17th ed.) Citation

Ratnayake, W. Mathematics Grade 11. Colombo 08: Sadeepa Publishing House, 2008.

MLA (9th ed.) Citation

Ratnayake, W. Mathematics Grade 11. Sadeepa Publishing House, 2008.

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