Khan, K., & Khan, R. (2012). Why we get a blue stain. Nature Publishing Group.
Chicago Style aipamenaKhan, K., and R. Khan. Why We Get a Blue Stain. Nature Publishing Group, 2012.
MLA aipamenaKhan, K., and R. Khan. Why We Get a Blue Stain. Nature Publishing Group, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.