I disagree that "Grandma's recollections" aren't a real source.
My mother typed up "Miriam's Memories" in the early 2000s. She recalled stories of her childhood, of their depression-era move to Buffalo, of her meeting my father, etc. etc. This is absolutely a source for much information I would NEVER find on a birth certificate or a probate record.
When citing this source, I need to include as muchinformation as possible, since it is not published and won't be easily accessible to anyone outside of our immediate family (unless I scan it and post it online, which I may do after her death).
In either case, it IS a source.