APA
Lewis G. M., . (1961). Educating the more able children in grades four, five and six. Washington, DC: US Dept. of Health, Education and Welfare.
Chicago
Lewis Gertrude M, . 1961. Educating the more able children in grades four, five and six. Washington, DC: US Dept. of Health, Education and Welfare.
Harvard
Lewis G. M., . (1961). Educating the more able children in grades four, five and six. Washington, DC: US Dept. of Health, Education and Welfare.
MLA
Lewis Gertrude M, . Educating the more able children in grades four, five and six. Washington, DC: US Dept. of Health, Education and Welfare. 1961.