Douglas, M. (1994). Sustainable use of agricultural soils: A review of the prerequisites for success or failure. GDE, Inst. of Geography.
Chicago-Zitierstil (17. Ausg.)Douglas, Malcolm. Sustainable Use of Agricultural Soils: A Review of the Prerequisites for Success or Failure. Berne: GDE, Inst. of Geography, 1994.
MLA-Zitierstil (9. Ausg.)Douglas, Malcolm. Sustainable Use of Agricultural Soils: A Review of the Prerequisites for Success or Failure. GDE, Inst. of Geography, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.