(2006). FACTS AT YOUR FINGERTIPS: MAMMALS. BROWN BEAR BOOKS.
Chicago Style aipamenaFACTS AT YOUR FINGERTIPS: MAMMALS. USA: BROWN BEAR BOOKS, 2006.
MLA aipamenaFACTS AT YOUR FINGERTIPS: MAMMALS. BROWN BEAR BOOKS, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.