Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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