Holler, Frederick L., author
ABC-Clio, 1981
Buku Teks
editors, Dermot Englefield, Gavin Drewry
Butterworth, 1984
Buku Referensi
Prytherch, Ray, author
Gower, 1987
Buku Referensi
Parker, C.C. (Christopher Charles), author
Butterworths, 1960
Buku Teks
Huszar, George B. de (George Bernard), 1919-1968, author
Littlefield, Adams, 1959
Buku Teks