edited by Peter Childs, Mike Storry
Routledge, 1999
Buku Referensi
edited by Sarah Tarlow and Susies West
Routledge, 1999
Buku Teks
Foundation for Nationalist Studies, 1981
Buku Teks
Penfold, John
Trentham Books, 1988
Buku Teks
Baldock, Peter
McGraw-Hill, 2011
Buku Teks