Cita APA

Willis, D., The University of Birmingham, & Collins Cobuild. (1998). Collins Cobuild student's grammar: Self-study edition with answers ([Rep. 1998].). London: HarperCollins.

Citación estilo Chicago

Willis, Dave, The University of Birmingham, and Collins Cobuild. Collins Cobuild Student's Grammar: Self-study Edition With Answers. [Rep. 1998]. London: HarperCollins, 1998.

Cita MLA

Willis, Dave, The University of Birmingham, and Collins Cobuild. Collins Cobuild Student's Grammar: Self-study Edition With Answers. [Rep. 1998]. London: HarperCollins, 1998.