APA (7th ed.) Citation

Nirmala Perera. (2016). SCIENCE: GRADE-11 Work book Part 1. Jeya Book Centre.

Chicago Style (17th ed.) Citation

Nirmala Perera. SCIENCE: GRADE-11 Work Book Part 1. Colombo: Jeya Book Centre, 2016.

MLA (9th ed.) Citation

Nirmala Perera. SCIENCE: GRADE-11 Work Book Part 1. Jeya Book Centre, 2016.

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