APA (7th ed.) Citation

Harper Collins & Collins Cobuild. (1992). Collins cobuld english grammar. Harper Collins.

Chicago Style (17th ed.) Citation

Harper Collins and Collins Cobuild. Collins Cobuld English Grammar. London: Harper Collins, 1992.

MLA (8th ed.) Citation

Harper Collins and Collins Cobuild. Collins Cobuld English Grammar. Harper Collins, 1992.

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