APA (7th ed.) Citation

Walter, E. A. (1981). Impact of trail use on the soils and vegetation of Petit Jean State Park, Arkansas. [publisher not identified].

Chicago Style (17th ed.) Citation

Walter, Elizabeth Anne. Impact of Trail Use on the Soils and Vegetation of Petit Jean State Park, Arkansas. [Place of publication not identified]: [publisher not identified], 1981.

MLA (9th ed.) Citation

Walter, Elizabeth Anne. Impact of Trail Use on the Soils and Vegetation of Petit Jean State Park, Arkansas. [publisher not identified], 1981.