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.
Cytowanie według stylu Chicago (wyd. 17)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.
Cytowanie według stylu MLA (wyd. 9)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.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..