Collins Cobuild English usage : helping learners with English.

MLA

Sinclair, John McHardy, et al. Collins Cobuild English Usage : Helping Learners with English. London: Harper Collins, 1993.

APA

Sinclair, J. McHardy, Fox, G., Manning, E., & Todd, J. (1993). Collins Cobuild English usage : helping learners with English. London: Harper Collins.

Chicago

Sinclair, John McHardy, Gwyneth Fox, Elizabeth Manning, and John Todd. Collins Cobuild English Usage: Helping Learners with English. London: Harper Collins, 1993.