APA (7th ed.) Citation

Ratnayake, W. (2004). Activity book: Mathematics grade 08. Sadeepa.

Chicago Style (17th ed.) Citation

Ratnayake, W. Activity Book: Mathematics Grade 08. Colombo: Sadeepa, 2004.

MLA (9th ed.) Citation

Ratnayake, W. Activity Book: Mathematics Grade 08. Sadeepa, 2004.