Cita APA (7th ed.)

CLARK II, E. H., HAVERKAMP, J. A., & CHAPMAN, W. (1985). Eroding soils: The off-farm impacts. Th Conservation Foundation.

Cita Chicago (17th ed.)

CLARK II, Edwin H., Jenniver A. HAVERKAMP, i William CHAPMAN. Eroding Soils: The Off-farm Impacts. Washington: Th Conservation Foundation, 1985.

Cita MLA (9th ed.)

CLARK II, Edwin H., et al. Eroding Soils: The Off-farm Impacts. Th Conservation Foundation, 1985.