APA (7th ed.) Citation

Piyadasa, G. R. (2009). New environmental studies: Book 4. Author.

Chicago Style (17th ed.) Citation

Piyadasa, Geraldine R. New Environmental Studies: Book 4. Colombo: Author, 2009.

MLA (9th ed.) Citation

Piyadasa, Geraldine R. New Environmental Studies: Book 4. Author, 2009.

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