APA (7th ed.) Citation

Yapa, M. S. (1993). Instant English Grammar. Roy Publications.

Chicago Style (17th ed.) Citation

Yapa, Munidasa Senerath. Instant English Grammar. Colombo: Roy Publications, 1993.

MLA (9th ed.) Citation

Yapa, Munidasa Senerath. Instant English Grammar. Roy Publications, 1993.

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