Business English for the 80's. (1980). Business English for the 80's. New Jersey: Prentice-Hall.
Chicago Style aipamenaBusiness English for the 80's. Business English for the 80's. New Jersey: Prentice-Hall, 1980.
MLA aipamenaBusiness English for the 80's. Business English for the 80's. New Jersey: Prentice-Hall, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.