APA (7th ed.) Citation

Wijethunga. S.D & vijeetunga.s.d. (2008). G.C.E. O/l Science: Past Paper with Answer. T.S.D. Wijethunga Publications.

Chicago Style (17th ed.) Citation

Wijethunga. S.D and vijeetunga.s.d. G.C.E. O/l Science: Past Paper with Answer. Sri Lanka: T.S.D. Wijethunga Publications, 2008.

MLA (9th ed.) Citation

Wijethunga. S.D and vijeetunga.s.d. G.C.E. O/l Science: Past Paper with Answer. T.S.D. Wijethunga Publications, 2008.