APA

Koch H. K., Phillips H. M. & National Center for Health Statistics (U.S.). (1974). Optometric manpower: characteristics of optometric practice, United States-1968. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics.

Chicago

Koch Hugo K, Phillips Hazel M and National Center for Health Statistics (U.S.). 1974. Optometric manpower: characteristics of optometric practice, United States-1968. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics.

Harvard

Koch H. K., Phillips H. M. and National Center for Health Statistics (U.S.). (1974). Optometric manpower: characteristics of optometric practice, United States-1968. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics.

MLA

Koch Hugo K, Phillips Hazel M and National Center for Health Statistics (U.S.). Optometric manpower: characteristics of optometric practice, United States-1968. Rockville, Md: U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics. 1974.