APA
Henry N. B., . (1950). Forty-ninth yearbook of the national society for the study of education; Part 2. Chicago: University of Chicago Press.
Chicago
Henry Nelson B, . 1950. Forty-ninth yearbook of the national society for the study of education; Part 2. Chicago: University of Chicago Press.
Harvard
Henry N. B., . (1950). Forty-ninth yearbook of the national society for the study of education; Part 2. Chicago: University of Chicago Press.
MLA
Henry Nelson B, . Forty-ninth yearbook of the national society for the study of education; Part 2. Chicago: University of Chicago Press. 1950.