edited by Brigadier Peter Young
Hamlyn, 1981
Buku Referensi
Gilbert, Martin
Routledge, 1994
Buku Teks
compiled and edited by Gotthold Rhode and Wolfgang Wagner
Brentano-Verlag, 1959
Buku Teks SO
Young, Peter
Bison Books, 1985
Buku Referensi
edited by Robert Meyer
David McKay Company, 1960
Buku Teks SO