editors, Dermot Englefield, Gavin Drewry
Butterworth, 1984
Buku Referensi
Holler, Frederick L., author
ABC-Clio, 1981
Buku Teks
editors by Maurice Line; Graham Mackenzie; John Feather
Bowker Saur, 1996
Buku Teks
Editors Graham Mackenzie; Ray Prytherch
Bowker Saur , 1991
Buku Teks
Wiggins, Gary, 1943-, author
McGraw-Hill, 1991
Buku Teks