Cita APA (7a ed.)

Haas, K. B., & Packer, H. Q. (1950). Preparation and use of audio-visual aids. Prentice-Hall.

Cita Chicago Style (17a ed.)

Haas, Kenneth Brooks, y Harry Q. Packer. Preparation and Use of Audio-visual Aids. New York: Prentice-Hall, 1950.

Cita MLA (9a ed.)

Haas, Kenneth Brooks, y Harry Q. Packer. Preparation and Use of Audio-visual Aids. Prentice-Hall, 1950.