APA (7th ed.) Citation

Ellis, M., O'Driscoll, N., & Pilbeam, A. (1989). Professional English: Communication skills for professionals working in business, industry and internat. organisations (1. publ., 4. impr.). Longman.

Chicago Style (17th ed.) Citation

Ellis, Mark, Nina O'Driscoll, and Adrian Pilbeam. Professional English: Communication Skills for Professionals Working in Business, Industry and Internat. Organisations. 1. publ., 4. impr. Harlow, Essex: Longman, 1989.

MLA (9th ed.) Citation

Ellis, Mark, et al. Professional English: Communication Skills for Professionals Working in Business, Industry and Internat. Organisations. 1. publ., 4. impr. Longman, 1989.