APA (7th ed.) Citation

Galappatti, J., Young, V., & Wijesinha, R. Our World of Science. British Council.

Chicago Style (17th ed.) Citation

Galappatti, Janaki, Valerie Young, and Rajiwa Wijesinha. Our World of Science. Colombo: British Council.

MLA (9th ed.) Citation

Galappatti, Janaki, et al. Our World of Science. British Council.