Cita APA (7th ed.)

Kessell, S. R. (1979). Gradient modeling: Resource and fire management. Springer.

Cita Chicago (17th ed.)

Kessell, Stephen R. Gradient Modeling: Resource and Fire Management. Nueva York: Springer, 1979.

Cita MLA (9th ed.)

Kessell, Stephen R. Gradient Modeling: Resource and Fire Management. Springer, 1979.