Braidwood, Robert J.
Prehistoric men
Natural History Museum, 1963
 Buku Teks
Braidwood, Robert J.
Prehistoric men
Chicago Natural History Museum, 1951
 Buku Teks
Murphy, Tom
Reclaiming the sky: 9/11 and the untold story of the men and women who kept America flying
American Management Association, 2007
 eBooks
Hales, Dianne
Mona Lisa : a life discovered
Simon & Schuster, 2014
 Buku Teks
Who`s who in America : a biographical dictionary of natable living men and women (1958-1959)
Marquis, 1899
 Buku Referensi