APA (7th ed.) Citation

Knowles, W. R. (1989). A national comparison of structural factors affecting participation in selected wildlife-related activities. [publisher not identified].

Chicago Style (17th ed.) Citation

Knowles, William Roy. A National Comparison of Structural Factors Affecting Participation in Selected Wildlife-related Activities. [Place of publication not identified]: [publisher not identified], 1989.

MLA (9th ed.) Citation

Knowles, William Roy. A National Comparison of Structural Factors Affecting Participation in Selected Wildlife-related Activities. [publisher not identified], 1989.