APA-viite (7. p.)

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-viite (17. p.)

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-viite (9. p.)

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.

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