APA

Dallas D., Pelham L., . (2008). Let,s Learn English Revised. London: Longman.

Chicago

Dallas Don, Pelham Linda, . 2008. Let,s Learn English Revised. London: Longman.

Harvard

Dallas D., Pelham L., . (2008). Let,s Learn English Revised. London: Longman.

MLA

Dallas Don, Pelham Linda, . Let,s Learn English Revised. London: Longman. 2008.