Ken Standfield. (2005). Intangible Finance Standards. ELSEVIER.
Chicago Style aipamenaKen Standfield. Intangible Finance Standards. ELSEVIER, 2005.
MLA aipamenaKen Standfield. Intangible Finance Standards. ELSEVIER, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.