Cita APA (7th ed.)
Ellis, M., O'Driscoll, N., & Pilbeam, A. (1984). Professional english: Communication skills for professionals working in business, industry and international organisations : teaching guide.
Cita Chicago (17th ed.)
Ellis, Mark, Nina O'Driscoll, i Adrian Pilbeam. Professional English: Communication Skills for Professionals Working in Business, Industry and International Organisations : Teaching Guide. Great Britain, 1984.
Cita MLA (9th ed.)
Ellis, Mark, et al. Professional English: Communication Skills for Professionals Working in Business, Industry and International Organisations : Teaching Guide. 1984.
Atenció: Aquestes cites poden no estar 100% correctes.