APA (7th ed.) Citation

Gibbs, G. I. (1941). The highway spiral. T. D. Toler.

Chicago Style (17th ed.) Citation

Gibbs, Glenn Irving. The Highway Spiral. Roanoke, Va.: T. D. Toler, 1941.

MLA (9th ed.) Citation

Gibbs, Glenn Irving. The Highway Spiral. T. D. Toler, 1941.