APA (7th ed.) Citation

Lai, Y. M. (2004). Progressive English grammar: Foundation of correct English. Preston.

Chicago Style (17th ed.) Citation

Lai, Y. M. Progressive English Grammar: Foundation of Correct English. [Singapopre: Preston, 2004.

MLA (9th ed.) Citation

Lai, Y. M. Progressive English Grammar: Foundation of Correct English. Preston, 2004.

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