United States of American. (2002). All Star: Student Book Bk. 2. NewYork: Mc Graw-Hill.
Chicago Style aipamenaUnited States of American. All Star: Student Book Bk. 2. NewYork: Mc Graw-Hill, 2002.
MLA aipamenaUnited States of American. All Star: Student Book Bk. 2. NewYork: Mc Graw-Hill, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.