APA (7th ed.) Citation

(2001). Science o/l past papers with answer…. S.D.Wijethunga Publication.

Chicago Style (17th ed.) Citation

Science O/l Past Papers with Answer…. Colombo: S.D.Wijethunga Publication, 2001.

MLA (9th ed.) Citation

Science O/l Past Papers with Answer…. S.D.Wijethunga Publication, 2001.

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