Cita APA (7a ed.)

Follet, R. F., & Stewart, B. A. (1985). Soil erosion and crop productivity. ASACSSASSSA.

Cita Chicago Style (17a ed.)

Follet, R. F., y B. A. Stewart. Soil Erosion and Crop Productivity. Madison, Wisconsin: ASACSSASSSA, 1985.

Cita MLA (8a ed.)

Follet, R. F., y B. A. Stewart. Soil Erosion and Crop Productivity. ASACSSASSSA, 1985.