There is no definitive way to determine this. In some cases the createdby user may be sufficient. The other option is to create one or more custom fields, and set the values differently for each mechanism by which the record is created
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Proposed as answer byGuido PreiteMVPWednesday, December 16, 2015 3:22 PM
Marked as answer byDonna EdwardsMVPMonday, December 28, 2015 5:00 PM