Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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