APA (7th ed.) Citation

(2012). G.C.E. O Level 15 Papers English I& II 1997-2011. Astan publication.

Chicago Style (17th ed.) Citation

G.C.E. O Level 15 Papers English I& II 1997-2011. Sri lanka: Astan publication, 2012.

MLA (9th ed.) Citation

G.C.E. O Level 15 Papers English I& II 1997-2011. Astan publication, 2012.

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