Cita APA (7th ed.)

Girard, J. W., & Gevorkiantz, S. R. (1939). Timber cruising. Forest Service, U.S. Dept. of Agriculture.

Cita Chicago (17th ed.)

Girard, James W., i Suren Rubenian Gevorkiantz. Timber Cruising. [United States]: Forest Service, U.S. Dept. of Agriculture, 1939.

Cita MLA (8th ed.)

Girard, James W., i Suren Rubenian Gevorkiantz. Timber Cruising. Forest Service, U.S. Dept. of Agriculture, 1939.