Cita APA

Association for Supervision and Curriculum Development. Committee on the Three R's in the Elementary School. (1952). The three R's in the elementary school. s. n.

Citación estilo Chicago

Association for Supervision and Curriculum Development. Committee on the Three R's in the Elementary School. The Three R's in the Elementary School. Washington: s. n, 1952.

Cita MLA

Association for Supervision and Curriculum Development. Committee on the Three R's in the Elementary School. The Three R's in the Elementary School. s. n, 1952.