edited by G.R. McLatchie and D.J. Leaper
Oxford University Press, 1996
Buku Referensi
Liechty, Richard D.
Mosby, 1985
Buku Teks
edited by Seymour I. Schwartz
McGraw-Hill Information Services, 1989
Buku Teks
edited by Bertrand Richert, Nilton Di chiacchio, Eckart Haneke
Informa, 2010
Buku Teks
Maurice King, Peter Bewes, James Cairns, Jim Thornton, editor
Oxford University Press, 1990
Buku Referensi