APA

National Institutes of Health, . (1989). NIH almanac. Bethesda, Md: Dept. of Health, Education, and Welfare, Public Health Service.

Chicago

National Institutes of Health, . 1989. NIH almanac. Bethesda, Md: Dept. of Health, Education, and Welfare, Public Health Service.

Harvard

National Institutes of Health, . (1989). NIH almanac. Bethesda, Md: Dept. of Health, Education, and Welfare, Public Health Service.

MLA

National Institutes of Health, . NIH almanac. Bethesda, Md: Dept. of Health, Education, and Welfare, Public Health Service. 1989.