APA (7th ed.) Citation

University of Birmingham & Willis, D. (1991). Collins COBUILD student's grammar: Classroom edition (First published.). HarperCollins.

Chicago Style (17th ed.) Citation

University of Birmingham and Dave Willis. Collins COBUILD Student's Grammar: Classroom Edition. First published. London: HarperCollins, 1991.

MLA (9th ed.) Citation

University of Birmingham and Dave Willis. Collins COBUILD Student's Grammar: Classroom Edition. First published. HarperCollins, 1991.

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