APA (7th ed.) Citation

Collins Cobuild. (1988). Essential english dictionary. HarperCollins.

Chicago Style (17th ed.) Citation

Collins Cobuild. Essential English Dictionary. Londres: HarperCollins, 1988.

MLA (9th ed.) Citation

Collins Cobuild. Essential English Dictionary. HarperCollins, 1988.

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