National Archives and Records Administration (NARA); Washington, D.C.; Soundex Index to Petitions for Naturalizations Filed in Federal, State, and Local Courts in New York City, 1792-1906 (M1674); Microfilm Serial: M1674; Microfilm Roll: 7; Ancestry.com. U.S. Naturalization Record Indexes, 1791-1992 (Indexed in World Archives Project) [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2010.
Find a Grave, database and images (https://www.findagrave.com/memorial/225410841/maurice-ahern : accessed 03 July 2022), memorial page for Maurice Ahern (21 Apr 1859–26 Jul 1922), Find a Grave Memorial ID 225410841, citing Calvary Cemetery, Woodside, Queens County, New York, USA ; Maintained by hgs205 (contributor 46875108) .