APA (7th ed.) Citation

Duerr, W. A. (1984). Forestry economics as problem solving. [publisher not identified].

Chicago Style (17th ed.) Citation

Duerr, William A. Forestry Economics as Problem Solving. Blacksburg, Va.: [publisher not identified], 1984.

MLA (9th ed.) Citation

Duerr, William A. Forestry Economics as Problem Solving. [publisher not identified], 1984.