APA (7th ed.) Citation

Gunaratna, K. (2006). Isaac Newton. Ratna.

Chicago Style (17th ed.) Citation

Gunaratna, Kumari. Isaac Newton. Colombo: Ratna, 2006.

MLA (9th ed.) Citation

Gunaratna, Kumari. Isaac Newton. Ratna, 2006.

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