(1990). Mosaic I: A listening/speaking skill book. New York: McGraw-Hill.
Chicago Style aipamenaMosaic I: A Listening/speaking Skill Book. New York: McGraw-Hill, 1990.
MLA aipamenaMosaic I: A Listening/speaking Skill Book. New York: McGraw-Hill, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.