APA (7th ed.) Citation

United States. Office of Education. (1933). Group activities for mentally retarded children: A symposium. [s.n.].

Chicago Style (17th ed.) Citation

United States. Office of Education. Group Activities for Mentally Retarded Children: A Symposium. [Washington]: [s.n.], 1933.

MLA (9th ed.) Citation

United States. Office of Education. Group Activities for Mentally Retarded Children: A Symposium. [s.n.], 1933.