APA

Godfrey E. P., . (1967). The state of audiovisual technology, 1961-1966. [Washington]: Dept. of Audiovisual Instruction, National Education Association of the United States.

Chicago

Godfrey Eleanor P, . 1967. The state of audiovisual technology, 1961-1966. [Washington]: Dept. of Audiovisual Instruction, National Education Association of the United States.

Harvard

Godfrey E. P., . (1967). The state of audiovisual technology, 1961-1966. [Washington]: Dept. of Audiovisual Instruction, National Education Association of the United States.

MLA

Godfrey Eleanor P, . The state of audiovisual technology, 1961-1966. [Washington]: Dept. of Audiovisual Instruction, National Education Association of the United States. 1967.