APA

National Education Association, . (1952). Human values in the elementary school. Washington: Department of Elementary School Principals.

Chicago

National Education Association, . 1952. Human values in the elementary school. Washington: Department of Elementary School Principals.

Harvard

National Education Association, . (1952). Human values in the elementary school. Washington: Department of Elementary School Principals.

MLA

National Education Association, . Human values in the elementary school. Washington: Department of Elementary School Principals. 1952.