Leo, J., & Leo Jones; Richard Alexander. (2003). New International business English: Communication skills in English for business purposes : student's book. Cambridge,New York: Cambridge University Press.
Chicago Style aipamenaLeo, Jones, và Leo Jones; Richard Alexander. New International Business English: Communication Skills in English for Business Purposes : Student's Book. Cambridge,New York: Cambridge University Press, 2003.
MLA aipamenaLeo, Jones, và Leo Jones; Richard Alexander. New International Business English: Communication Skills in English for Business Purposes : Student's Book. Cambridge,New York: Cambridge University Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.