Hartmann, P. (2007). Interactions 2: Reading CD. New York: McGraw Hill.
Chicago Style aipamenaHartmann, Pamela. Interactions 2: Reading CD. New York: McGraw Hill, 2007.
MLA aipamenaHartmann, Pamela. Interactions 2: Reading CD. New York: McGraw Hill, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.