APA (7th ed.) Citation

De Silva, B. (2011). An aid to spellings (with exercises & answers). Godage.

Chicago Style (17th ed.) Citation

De Silva, Bernard. An Aid to Spellings (with Exercises & Answers). Colombo: Godage, 2011.

MLA (9th ed.) Citation

De Silva, Bernard. An Aid to Spellings (with Exercises & Answers). Godage, 2011.

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