APA (7th ed.) Citation

(2011). GCE O' Level Questions with Answers: வரலாறு. Astan Publication.

Chicago Style (17th ed.) Citation

GCE O' Level Questions with Answers: வரலாறு. Colombo: Astan Publication, 2011.

MLA (9th ed.) Citation

GCE O' Level Questions with Answers: வரலாறு. Astan Publication, 2011.

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