APA

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

Chicago

Haas Kenneth Brooks, Packer Harry Q, . 1950. Preparation and use of audio-visual aids. New York: Prentice-Hall.

Harvard

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

MLA

Haas Kenneth Brooks, Packer Harry Q, . Preparation and use of audio-visual aids. New York: Prentice-Hall. 1950.