APA-Zitierstil (7. Ausg.)

Não informado. (1956). Instructional materials. National Education Association, Department of Audio Visual Instruction.

Chicago-Zitierstil (17. Ausg.)

Não informado. Instructional Materials. Washington: National Education Association, Department of Audio Visual Instruction, 1956.

MLA-Zitierstil (8. Ausg.)

Não informado. Instructional Materials. National Education Association, Department of Audio Visual Instruction, 1956.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.