Cita APA

National Education Association of the United States. Dept. of Classroom Teachers & National Education Association of the United States. Research Division. (1940). Discussion pamphlet. no. 1-. s.n.

Citación estilo Chicago

National Education Association of the United States. Dept. of Classroom Teachers and National Education Association of the United States. Research Division. Discussion Pamphlet. No. 1-. Washington: s.n, 1940.

Cita MLA

National Education Association of the United States. Dept. of Classroom Teachers and National Education Association of the United States. Research Division. Discussion Pamphlet. No. 1-. s.n, 1940.