Cita APA (7th ed.)
Brooker, F. E., & Henry, N. (1949). The forty-ninth yearbook: Of the National Society for the Study of Education. Part I: Audio-visual materials of instruction.
Cita Chicago (17th ed.)
Brooker, Floyde E., i Nelson Henry. The Forty-ninth Yearbook: Of the National Society for the Study of Education. Part I: Audio-visual Materials of Instruction. 1949.
Cita MLA (9th ed.)
Brooker, Floyde E., i Nelson Henry. The Forty-ninth Yearbook: Of the National Society for the Study of Education. Part I: Audio-visual Materials of Instruction. 1949.
Atenció: Aquestes cites poden no estar 100% correctes.