APA (7th ed.) Citation

Perera. (2016). Science Grade -7. Jaya Book centre.

Chicago Style (17th ed.) Citation

Perera. Science Grade -7. Colombo 11: Jaya Book centre, 2016.

MLA (9th ed.) Citation

Perera. Science Grade -7. Jaya Book centre, 2016.

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