APA Edition Citation

Mckown, H. C., & Roberts , A. B. (1949). Audio visual aids to instruction (3rd ed.).

Chicago Edition Citation

Mckown, Harry C., and Alwin B. Roberts. Audio Visual Aids to Instruction. 3rd ed. 1949.

MLA Edition Citation

Mckown, Harry C., and Alwin B. Roberts. Audio Visual Aids to Instruction. 3rd ed. 1949.

Warning: These citations may not always be 100% accurate.