APA aipamena

National Library of Medicine (U.S.) National Library of Medicine (U.S.) NIM audiovisuals catalogs. (1991). National Library of Medicine audiovisual catalog: Annual cumulation 1991. U.S. Dept. of Health and Human Services, National Library of Medicine.

Chicago Style aipamena

National Library of Medicine (U.S.) National Library of Medicine (U.S.) NIM audiovisuals catalogs. National Library of Medicine Audiovisual Catalog: Annual Cumulation 1991. Bethesda, MD: U.S. Dept. of Health and Human Services, National Library of Medicine, 1991.

MLA aipamena

National Library of Medicine (U.S.) National Library of Medicine (U.S.) NIM audiovisuals catalogs. National Library of Medicine Audiovisual Catalog: Annual Cumulation 1991. U.S. Dept. of Health and Human Services, National Library of Medicine, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.