APA (7th ed.) Citation

Harper & Sinclair, J. (1994). Collins Cobuild, English language dictionary. Harper.

Chicago Style (17th ed.) Citation

Harper and John Sinclair. Collins Cobuild, English Language Dictionary. London: Harper, 1994.

MLA (8th ed.) Citation

Harper and John Sinclair. Collins Cobuild, English Language Dictionary. Harper, 1994.

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