APA (7th ed.) Zitazioa

Ringger, E. Document Recognition and Retrieval XXII. SPIE Digital Library.

Chicago Style (17th ed.) Zitazioa

Ringger, Eric. Document Recognition and Retrieval XXII. SPIE Digital Library.

MLA (9th ed.) Zitazioa

Ringger, Eric. Document Recognition and Retrieval XXII. SPIE Digital Library.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.