APA

National Commission on Teacher Education and Professional Standard, . (1956). The professional standards movement in teaching: progress and projection. Washington D.C: National Education Association of the United States.

Chicago

National Commission on Teacher Education and Professional Standard, . 1956. The professional standards movement in teaching: progress and projection. Washington D.C: National Education Association of the United States.

Harvard

National Commission on Teacher Education and Professional Standard, . (1956). The professional standards movement in teaching: progress and projection. Washington D.C: National Education Association of the United States.

MLA

National Commission on Teacher Education and Professional Standard, . The professional standards movement in teaching: progress and projection. Washington D.C: National Education Association of the United States. 1956.