APA (7th ed.) Citation

Christensen, W. R. (1974). Visual presentation strategies and conceptual learning. [publisher not identified].

Chicago Style (17th ed.) Citation

Christensen, William Royce. Visual Presentation Strategies and Conceptual Learning. [Place of publication not identified]: [publisher not identified], 1974.

MLA (9th ed.) Citation

Christensen, William Royce. Visual Presentation Strategies and Conceptual Learning. [publisher not identified], 1974.