Charles Webel and Mark Tomass, editors
Routledge, Taylor & Francis Group, 2017
Buku Teks
edited by Geoffrey A. Hosking and George F. Cushing
Macmillan Press, 1989
Buku Teks
Burton, Graeme
McGraw-Hill, 2010
Buku Teks
Hall, James
John Murray, 1995
Buku Referensi
edited by Lorenzo Magnani and Ping Li
Springer, 2012
eBooks