APA (7th ed.) Zitazioa

Morgan, R. P. C. (1998). Soil erosion and conservation. (2nd ed.). Longman.

Chicago Style (17th ed.) Zitazioa

Morgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Essex: Longman, 1998.

MLA (9th ed.) Zitazioa

Morgan, R.P.C(Royston Philip Charles). Soil Erosion and Conservation. 2nd ed. Longman, 1998.