Bell, E.T.
Men of mathematics
Simon & Schuster, 1986
 Buku Teks SO
Men of achievement
editor, Ernest Kay
Melrose Press Ltd., 1995
 Buku Referensi
Braidwood, Robert J.
Prehistoric men
Natural History Museum, 1963
 Buku Teks
Elliott, Osborn
Men at the top
Harper & Brothers , 1959
 Buku Teks
Donaldson, Gordon
Eighteen men
Doubleday, 1985
 Buku Teks SO