APA (7th ed.) Citation

D.M.A.Devasinghe. (2011). Science Gr 11. Samudra Book Publications.

Chicago Style (17th ed.) Citation

D.M.A.Devasinghe. Science Gr 11. Sri Lanka: Samudra Book Publications, 2011.

MLA (9th ed.) Citation

D.M.A.Devasinghe. Science Gr 11. Samudra Book Publications, 2011.

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