Holler, Frederick L.
ABC-Clio, 1981
Buku Teks
editors by Maurice Line; Graham Mackenzie; John Feather
Bowker Saur, 1996
Buku Teks SO
Editors Graham Mackenzie; Ray Prytherch
Bowker Saur , 1991
Buku Teks SO
edited by C.P. Ager
Bowker-Saur, 1992
Buku Referensi
editors, L.T. Morton, S. Godbolt
Butterworth, 1984
Buku Referensi