Barnard, Marjorie
Angus and Robertson, 1962
Buku Teks
Barnard, Marjorie
Frederick A. Praeger, 1966
Buku Teks
Freeland, J.M. (John Maxwell), 1920-, author
F.W. Cheshire, 1968
Buku Teks
Macintyre, Stuart, author
Oxford University Press, 1986
Buku Teks
edited by F.K. Crowley
Heinemann, 1984
Buku Teks