Langer, E. J. Mindfulness. D A Capo Press.
Chicago Style (17th ed.) ZitazioaLanger, Ellen J. Mindfulness. Boston: D A Capo Press.
MLA (9th ed.) ZitazioaLanger, Ellen J. Mindfulness. D A Capo Press.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.