Style de citation APA (7e éd.)
(1991). Collins Cobuild Student's Grammar: Practice Material by Dave Willis. Self-study Edition with Answer Key. HarperCollins Publishers Ltd.
Style de citation Chicago (17e éd.)
Collins Cobuild Student's Grammar: Practice Material by Dave Willis. Self-study Edition with Answer Key. London: HarperCollins Publishers Ltd, 1991.
Style de citation MLA (9e éd.)
Collins Cobuild Student's Grammar: Practice Material by Dave Willis. Self-study Edition with Answer Key. HarperCollins Publishers Ltd, 1991.
Attention : ces citations peuvent ne pas être correctes à 100%.