Dyfyniad APA

Mehuys, G. R., Tiessen, K. H., Villatoro, M., Sancho, F., & Lobb, D. A. (2009). Tillage erosion by the disc plow on steepland volcanic soils in Costa Rica.

Dyfyniad Arddull Chicago

Mehuys, Guy R., Kevin H.D Tiessen, Mario Villatoro, Freddy Sancho, y David A. Lobb. Tillage Erosion By the Disc Plow On Steepland Volcanic Soils in Costa Rica. 2009.

Dyfyniad MLA

Mehuys, Guy R., et al. Tillage Erosion By the Disc Plow On Steepland Volcanic Soils in Costa Rica. 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.