APA (7th ed.) Citation

Kahl, K. (1992). Investigation of appropriate objects for safe stopping sight distances. [publisher not identified].

Chicago Style (17th ed.) Citation

Kahl, Karen. Investigation of Appropriate Objects for Safe Stopping Sight Distances. [Place of publication not identified]: [publisher not identified], 1992.

MLA (9th ed.) Citation

Kahl, Karen. Investigation of Appropriate Objects for Safe Stopping Sight Distances. [publisher not identified], 1992.