Morgan, R. P. C. (1998). Soil erosion and conservation. (2nd ed.). Longman.
Citación estilo ChicagoMorgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Essex: Longman, 1998.
Cita MLAMorgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Longman, 1998.
Warning: These citations may not always be 100% accurate.