And it is important to cite whatever the source was, including:
* Personal knowledge of John L. Smith, as interviewed by his daughter Jillaine Smith, 25 December 1999, Solana Beach, California.
* Unknown author, Hand-written note, undated, among the papers of Dr. B.M. Malloy, (address withheld for privacy), Washington DC, citing a family bible: "Mary Jones married Luther Mathis 18 June 1898."
* Family Tree of Robert Jones, at Ancestry.com [include full URL], accessed 9 December 2013.
The point is to cite whatever you used so that when we read the information, we can assess the combined evidence and come to appropriate conclusions-- and/or know where we need to go to dive deeper for better evidence.