Blaikie, P., .Brookfield, H. C., Allen, B., Crittenden, R., & Clarke, W. (1987). Land degradation and society. Methuen.
Chicago-čujuhus (17. p.)Blaikie, Piers, H. C. .Brookfield, Bryant Allen, Robert Crittenden, juo William Clarke. Land Degradation and Society. London ; New York: Methuen, 1987.
MLA-čujuhus (9. p.)Blaikie, Piers, et al. Land Degradation and Society. Methuen, 1987.
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