Lai, Y. M. (2004). Progressive English grammar: Foundation of correct English. Preston.
Chicago Style (17th ed.) CitationLai, Y. M. Progressive English Grammar: Foundation of Correct English. [Singapopre: Preston, 2004.
MLA (9th ed.) CitationLai, Y. M. Progressive English Grammar: Foundation of Correct English. Preston, 2004.
Warning: These citations may not always be 100% accurate.