APA (7th ed.) Citation

Harper Collins. (1996). Collins Cobuild, learner's dictionary. Harper Collins.

Chicago Style (17th ed.) Citation

Harper Collins. Collins Cobuild, Learner's Dictionary. London: Harper Collins, 1996.

MLA (8th ed.) Citation

Harper Collins. Collins Cobuild, Learner's Dictionary. Harper Collins, 1996.

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