The citation information for Dry September is this:
The story itself is found in an anthology of William Faulkner's works entitled
Collected Stories of William Faulkner, published by Vintage International in November of 1995, and there doesn't seem to be an editor. The story is found on pages 169-183, if that information is at all relevant. If you have trouble creating a work cited entry with the information provided above, just email me.
[Update: Yes, Vintage International in New York]
The citation information for A Good Man is Hard to Find will have to wait until I can get the book I copied it from back from my colleague, Amber.