editor, Ruth D. Whitehouse
Macmillan Press, 1983
Buku Referensi
Cook, Chris, author
Macmillan, 1990
Buku Referensi
Parker, R.H., author
Macmillan, 1992
Buku Referensi
Macmillan, 1994
Buku Referensi
Pollmann, Friedrich, author
Macmillan, 1976
Buku Referensi