APA aipamena

Calderón Delgado, M. A. (2008). Preventive conservation of documents.

Chicago Style aipamena

Calderón Delgado, Marco A. Preventive Conservation of Documents. 2008.

MLA aipamena

Calderón Delgado, Marco A. Preventive Conservation of Documents. 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.