Smith, Thomas C.
Standford University Press, 1959
Buku Teks
Smith, Thomas C.
Standford University Press, 1965
Buku Teks
Butterfield, Herbert
The Free Press , 1957
Buku Teks
edited by Jean-Jacques Hublin, Shannon P. McPherron
Springer Science, 2012
eBooks
Partridge, Eric, 1894-1979
Routledge, 1991
Buku Referensi