APA (7th ed.) Zitazioa
Jens Horbach. Indicator Systems for Sustainable Innovation. Physica.
Chicago Style (17th ed.) Zitazioa
Jens Horbach. Indicator Systems for Sustainable Innovation. Heidelberg, Alemania: Physica.
MLA (9th ed.) Zitazioa
Jens Horbach. Indicator Systems for Sustainable Innovation. Physica.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.