Firth, Raymond, author
Routledge & Kegan Paul, 1971
Buku Teks
Johnson, Chalmers, 1931-2010, author
Stanford university press, 1962
Buku Teks
edited by Jack M. Potter
Little, Brown, 1967
Buku Teks
Murray, Les A., author
University of Queensland, 1978
Buku Teks
Leijonhufvud, Axel
London Oxford University Press , 1968
Buku Teks