Make a duplicate file of your draft or print it. Add highlights in one color to mark all your source identifications; use another color to mark source material:

The problem of unintended consequences is well illustrated by many environmental changes over recent decades. For instance, if using the Mojave Desert for cattle grazing seemed efficient to ranchers, it also turned out to be destructive for long-time desert residents such as tortoises (Babbitt 152).

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