Thomas Hegghammer, editor
Cambridge University Press, 2017
Buku Teks
Riggs, James L.
McGraw-Hill, 1974
Buku Teks
Wolfgang G. Weber, Michael Thomas, Annette Ostendorf, Lynne Chisholm, editors
[Springer, ], 2012
eBooks
Trecker, Harleigh B.
Association Press, 1967
Buku Teks
Hauser, Arnold
Alfred A. Knopf , 1952
Buku Teks