APA Style

Services, U, D, O, H, A, H., Medicine, N, L, O. (1994). National Library Of Medicine Classification (5). Washington DC: US Department Of Health and Human Services, National Library Of Medicine.

MLA Style

Services, US, Department, Of, Health, And, Human., Medicine, National, Library, Of. "National Library Of Medicine Classification". 5 Washington DC: US Department Of Health and Human Services, National Library Of Medicine, 1994. Text.