APA (7th ed.) Citation

Gelb, I. J., Wrolstad Merald, E., & Kolers, P. A. (1980). Principles of Writing Systems within the Frame of Visual Communication.

Chicago Style (17th ed.) Citation

Gelb, I. J., E. Wrolstad Merald, and Paul A. Kolers. Principles of Writing Systems Within the Frame of Visual Communication. New York/London, 1980.

MLA (8th ed.) Citation

Gelb, I. J., et al. Principles of Writing Systems Within the Frame of Visual Communication. 1980.