APA (7th ed.) Citation

Helm, S., & Utteridge, R. (2010). Market leader: Business English (1. publ.). Longman.

Chicago Style (17th ed.) Citation

Helm, Sara, and Rebecca Utteridge. Market Leader: Business English. 1. publ. Harlow: Longman, 2010.

MLA (9th ed.) Citation

Helm, Sara, and Rebecca Utteridge. Market Leader: Business English. 1. publ. Longman, 2010.

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