APA (7th ed.) Citation

Abeywickrama, A. English Grammar Patterns in a Progressive Way. Author.

Chicago Style (17th ed.) Citation

Abeywickrama, A.M. English Grammar Patterns in a Progressive Way. Lunuwila: Author.

MLA (9th ed.) Citation

Abeywickrama, A.M. English Grammar Patterns in a Progressive Way. Author.

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