Cita APA (7a ed.)
Cook, S. F. (1949). Soil erosion and population in central Mexico. University of California Press.
Cita Chicago Style (17a ed.)
Cook, Sherburne Friend. Soil Erosion and Population in Central Mexico. Berkeley, Los Angeles: University of California Press, 1949.
Cita MLA (9a ed.)
Cook, Sherburne Friend. Soil Erosion and Population in Central Mexico. University of California Press, 1949.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.