Easterbrook, Philippa J., author
Elsevier, 2005
Buku Teks
Current Research in Britain
British Library Board, 1987
Buku Teks
by V. Lawrence Parsegian ... [et.al.]
Academic Press, 1968
Buku Teks
Longman, 1989
Buku Referensi
Kaplan, Robert M., author
Allyn and Bacon , 1987
Buku Teks