APA (7th ed.) Citation

Yogenthiri Sugunthan. Science Partt 1 Grade 9. Lanka Book Deport.

Chicago Style (17th ed.) Citation

Yogenthiri Sugunthan. Science Partt 1 Grade 9. Colombo: Lanka Book Deport.

MLA (9th ed.) Citation

Yogenthiri Sugunthan. Science Partt 1 Grade 9. Lanka Book Deport.

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